ICT Applications: ICT IGCSE Theory - Presentation

ICT IGCSE Theory – Presentation
ICT Applications
6.1 Communication applications
6.2 Data handling applications
6.3 Measurement applications
6.4 Microprocessors in control applications
Chapter 6: ICT Applications
6.5 Modelling applications

6.6 Applications in manufacturing industries
6.7 School management systems
6.8 Booking systems
6.9 Banking applications
6.10 Computers in medicine
6.11 Computers in libraries
6.12 Expert systems
6.13 Computers in the retail industry
6.14 Recognition systems
6.15 Monitoring and tracking systems
6.16 Satellite systems
MR. BENJAMIN ADU APPIAH

ICT Applications
6.1 Communication Applications
Paper Based
Types of Communication & Purpose Use of Computers
News Letter: Used by companies to communicate certain information to staff and • Save and insert pictures
customers. May contain information on recent events and identify success from clipart, Internet,
company may have experienced. scanned images & digital
camera.
• Adjust the page layout.
Brochures/Leaflet: Can be used to advertise a company or to be informative.
Brochures are normally printed on glossy paper with a high quality finish. • Create and Insert
Tables/charts
• Formatting the layout of
Flyers: Informative document which can be distributed to promote or create
awareness of an up and coming events. the document.
• Applying effects to
images (crop, colour
Posters: larger then flyers and are strategically positioned to promote and create
awareness. Displayed on billboards, notice boards, buildings as part of an scale, rotate etc.)
advertising campaign to target a specific target audience. Text Formatting

• Font Style
• Bold
Advantages Disadvantages • Alignment (left, centre,
• Not necessary to have a computer or • These communication would mainly be right and fully justified)
internet connection. distributed by hand. • underline
• You have a physical copy of the • Printing costs • Italic
document. • Restricted to a smaller target audience. • colour

ICT Applications
Computer Based Cartoons (Animations)

Types of Communication & Purpose Animations can also
be created using
Websites specialist software
• Companies use websites as a means to communicate with existing and to promote new
potentially new customers. products.
• Websites can be easily updated and can provide relevant and up to
date information. Music Scores
• Websites can be used to research, social network, online gaming or for Music can now be
online shopping and banking. created and edited
Multimedia Presentations on computers. Can
be used as part of
• A common use for presentations is to provide training in businesses or adverts or slogans.
places of education. The presentation will be a focal point on the
projector whilst the speaker is presenting.
Advantages Disadvantages
• Can include interactive elements • Websites can be hacked and
such as sound, video, animation and information may be altered.
hyperlinks. • Setting up website and maintaining
• Can be available on different would be expensive and would
platforms. require a special skill set.

ICT Applications
Mobile Based Voice Over Internet Protocol

(VoIP)
Types of Communication & Purpose
When voice calls

Phone Calls: Allow users to make audio phone calls to each other from
are taken place
any location within the network coverage area.
over an internet
Text Messages: Allows user to send simple messages to each other even connection (e.g.
if Whatsapp, Viber).
the recipients phone is turned of or not within network coverage.
Accessing the Internet: Email and social networking applications are now
available on mobile phones which makes it easier for users to stay in
contact with each other. Businesses can also use these apps to advertise
and communicate with customers. Disadvantages
Advantages
• Mobile phone is portable and can • Long distance calls or phones calls in
be used on the move. different countries could be expensive.
• Mobile phone contracts can offer • Mobile signal could be weak or non
free minutes and texts. existent in some places.

ICT Applications
6.2 Data Handling Applications
Advantages of Data Handling Applications for Storing Data:

• Data can be updated, organised, sorted and searched in different ways.
• Data can be displayed or printed in different formats.

• Data can be backed up or moved using storage media.
• Huge storage space not required (filing cabinets)
Address Lists Surveys School Records

Mobile phones include Information from Student records including
address books which surveys could be held assessment and behaviour
include contact names, on a database so that data. Also staff data could
numbers, email data could be analysed also be held on database
addresses etc. and queried.
Club/Society Records Libraries

Information on current members Information on current books
including names and contact details. which are available to borrow
Also members methods of payment and members of the libraries.
to pay membership fee.

ICT Applications
6.3 Measurement applications
Role of Measurement Applications 1 - Input devices called

sensors feed data into the
Sensors are placed to measure physical variables. The
computer.
data from sensors are measured in analogue. The

analogue signal is then converted to a digital signal
using a converter.
2 - The computer then
Examples processes the input data.
Weather Thermometer for measuring temperature
Anemometer for measuring wind speed
Sensor readings are compared to
Stations
Wind vane for measuring wind direction the preset values.
Hygrometer for measuring humidity
Barometer for measuring atmospheric pressure
Green Sensors are placed in the green house to measure

House whether plants are growing in the correct 3 - As a result of the
conditions:
• Light, Moisture, Humidity, PH Levels
processing, the computer can
send a signal to the output
Patients Sensors will be attached to the body to monitor: devices called actuators which
Vital Signs • heartbeat, blood pressure, temperature etc. could change physical
conditions.

ICT Applications
6.3 Measurement Applications
Why Use Computers to Measure Things?

• Computers do not require breaks .
• Readings are more accurate compared to

Data collected from humans.
Sensors is in Analogue • Readings are taking more frequently.
• Data can be analysed and compared with
ADC - Analogue-to-digital converter existing data.
• Automatic graphs can be created.
Analogue Signal now can
be understood by • Sensors can work in extreme conditions
computers. which could be dangerous for humans.
• People can complete other tasks whilst the
systems works automatically.
• If human intervention is required then a
signal will be sent to the buzzer.

ICT Applications
6.4 Microprocessors in Control Applications
Role of Microprocessor in Control Applications 1 - Input devices called

• Sensor readings are compared to the pre-set value which are sensors feed data into the
computer.
inputted by the user.

• If sensor readings are below or higher then then the pre-set value
then a signal will be sent to the actuator to change the physical
conditions.
• Process is constantly will be repeated. 2 - The computer then
processes the input data.
Example Process Microprocessor Output
Sensor readings are compared to
Green House Compares light, temperature, • Light on/off
the preset values.
moisture to Pre-set value. • Heater on/off
• Motor
Sends signal to actuator is necessary.
Process is constantly repeated
open/close windows
3 - As a result of the
Patients Vital Compares Vital signs (heartbeat, blood • Buzzer will alert processing, the computer can
Signs pressure, temperature to Pre-set staff to any vital value. send a signal to the output
signs which are devices called actuators which
below the could change physical
Sends signal to actuator is necessary. expected values.
Process is constantly repeated conditions.

ICT Applications
6.4 Microprocessors in control applications
Green House (Temperature Example)

Less than < 20 Degrees
Send signals to
Motor to close
Window and Turn
1 – Input Heater ON
Microprocessor
ADC
Preset:
Sensors
Monitoring 20 Degrees
Continuously Process Send signals to
Repeated Motor to open
More than > 20 Degrees
Window
Examples in a Green House

• Light
• Moisture
• Humidity
• PH Levels

ICT Applications
The developers have used the results from the model to

choose a computer controlled flood defense system. It
will have a barrier which can open or close.
Describe the role of the microprocessor in such a system.
Exam Question
Keywords: Sensor, ADC, Microprocessor, Preset, Higher,
Lower,
Barrier, Continuous (Repeat)
Pre-set
Barrier
MR. BENJAMIN ADU APPIAH Sensors

ICT Applications
Graphs showing levels of

pollution at each Sensor
A Sensor A compared to the previous

year
Graphs showing levels of
2018
2017
pollution at each Sensor Sensor B
2018
2017
B
2018
2017
Sensor A
Sensor B
Sensor C
C
Sensor C
ICT Applications
Describe the role of the microprocessor in controlling the oven temperature.

Key Words: sensor, ADC, Microprocessor, Pre-set, Higher, Lower, Repeat
The sensor takes temperature readings in the oven. The sensor signal will be
converted from analogue to digital. The microprocessor receives the data from
the sensor and compares to the preset value. If the temperature is lower than
the pre-set value then the Microprocessor will send a signal to turn the heater
on. If the temperature is higher than the pre-set value then the Microprocessor
will send a signal to turn the heater off. The process will continue to repeat to
maintain a constant temperature.
The weather station continuously monitors the sensors on the weather balloon. Describe the
monitoring process. Key Words: Sensor, ADC, Microprocessor, Pre-set, Spreadsheet, Graphs,
Time
The sensor feeds data into the computer . The data is converted from analogue to digital . The
reading are then recorded on to spreadsheets application. Graphs are automatically produced by
the computer. The graphs can be plotted against time to examine the rate of cooling and
compare against previous entries.
Sometimes you can also say the microprocessor can compare readings from different stations.
Exam Question
ICT Applications
Turtle Graphics
Tip: In this question you have to

write out the remaining steps.
1st: Work out how many more steps

you have to get around the shape. (8)
2nd : It is possible you may have to
use a repeat to draw the shape.
3rd: Remember to end the repeat.

ICT Applications
Turtle Graphics
A student wishes to use a floor turtle to draw this shape which has no two lines the same
length:
Name four different instructions which the turtle graphics software could use in order to
draw the shape. For each one explain the meaning of the instruction.
Tip: They may actual ask you to write

possible instructions and the
meanings to draw the shape shown.

ICT Applications
6.5 Modelling Applications
A computer model is a model which would replicate (simulate) the functions of a

real system.
To save costs and time To train people how to

by testing a system use the system in a
before you build it. safe controlled
environment.
e.g. Creating bridges e.g. Flight Simulators.
Why we use Computer Models?
To make predictions of
To investigate the how the system would
capabilities of the system operate in the future.
in detail by interrogating
and manipulating the e.g. Use of
computer model. spreadsheets to track
profit/loss over time
ICT Applications
6.5 Modelling Applications
Type of Modelling Application

• Business used can use spreadsheets to forecast spreadsheet
models to forecast future profit or loss.
Spreadsheets • Due to the use of formulas business can adjust certain values to see
automatic changes in potential revenue.
• Pilots are able to learn how to fly a plane using a flight simulator.
• The controls and the interface is the same as real plane.
Flight
• Different conditions can be tested.
Simulator • Reduced costs as a plane would not be damaged in the training.
• Before buildings are constructed simulations take place to ensure

Building they are fit for purpose.
Simulator • Simulations ensure the potential building could cope with physical
demands including earthquake/storm threats.
• A traffic light simulator looks at the flow of traffic (data captured

from sensors).
Traffic Lights
• The simulator will adjust the lights to best control the flow of traffic.

ICT Applications
Describe the advantages of using computer modelling to replicate (simulate) the functions of
a real system?
Key Words: costs, controlled environment, train, investigate, predictions
Computer modeling simulates the functions of a real system in controlled environment. For
example a pilot training to fly a plane will use a flight simulator. It will be a safer environment
and also reduce costs as a real plane will not have to be used or damaged. Spreadsheets are
another example of computer modelling. User can use spreadsheets to investigate the data
and to make predictions. For example projected profits for a month can be calculated on
spreadsheets.
Exam Question
ICT Applications
The city of Venice is in danger of being damaged due to rising sea levels. A new
computer controlled flood defence system is being planned. The developers of
the system are using a spreadsheet to model the plan.
Give three reasons why computer models are used to simulate the flood
defense system.
Cheaper than building the real thing

− Quicker to see results rather than building it
− Safer than building the real thing
− Easier to change variables in the model/can use what
ifs
Exam Question
ICT Applications
6.6 Applications in Manufacturing Industries
Robots are used in manufacturing to help to improve productivity, consistency (in terms of final finish) and
to reduce overall running costs. Robots generally make the factory a much more safer environment for
workers.
How Are Robots Used in a Factory?

1. Lift heavy items
2. Assemble parts together
3. Paint items (Spraying)
4. Manufacturing Microchips
Robots are programmed with a sequence of
Exact sequence of The robot is now able to carry out the
instructions. The programmer may guide the
movement is stored in same sequence of instructions over and
robot through each step physically or by
the memory. over again.
controlling the robot by remote.
• Robots can work 24/7 with the same consistency and Robots cannot easily adapt to a situation which is beyond
accuracy compared to humans. their sequence of instructions.
• Robots can be more productive than humans. Robots can be expensive to buy and maintain.
• Robots can work in extreme conditions not suitable Some workers may loose their jobs as robots can do more
for humans. labor intensive jobs.
• Robots do not need to be paid. People are deskilled due to robots doing more
complicated jobs.

ICT Applications
Describe the advantages and disadvantages to the company of using robots rather
than humans to manufacture cars.
 Work 24/7 – same consistency and  Expenditure

accuracy  Jobs may be lost
 More productive  Robots cannot adapt
 Work in extreme/dangerous conditions  Humans deskilled.
 Do not need to be paid
Robots are able to work 24/7 with the same consistency and accuracy. Furthermore Robots do
not get tired and therefore are more productive. However purchasing and maintaining the
robots could be more expensive. Jobs may be lost as robots are now taking over jobs once
completed by humans. As a result humans may also be deskilled. Alternatively robust are
unable to adapt to a change in conditions however they can be used in extreme or dangerous
conditions. Since the robots do not require a salary; expenditure costs would be reduced.

ICT Applications
The managers have been told they can use this robot for other tasks by replacing
the existing sensors with different ones.
Give three advantages of using an existing robot device rather than developing
a new one.
• More likely to be reliable as it is known that the device will work

• It is cheaper than paying full development costs
• It is quicker to get into operation as the device has been built
• Lower maintenance costs as faults will be known
• Lower costs for training staff
Exam Question
ICT Applications
A robot is used as a computerised postal delivery system. It drives around the

corridors of a set of offices picking up and delivering post. If the robot is close to a
worker it stops and waits until the worker moves away.
(a) A proximity sensor is used to detect how close to a worker the robot is.
Describe theherole of t microprocessor in stopping the robot.
• The data from the sensor is compared to the pre-set value

• The pre-set value is set to show the minimum distance of the
• worker
If–the values
The are the same/lower
microprocessor sends a signal to the actuator to stop the motor/robot
• If the values are different/higher
– The microprocessor does nothing/robot keeps moving
• The process is continuous
Exam Question
ICT Applications
6.7 School Management Systems
School Management Systems are

Typenow
of used in schools
Modelling by staff to complete a number of tasks on a daily basis.
Application
Learner • Teachers will be able to click on a particular class and complete the register.
Registration • Once this is saved then other users of the management system can see who has been
register for that particular period.

and Attendance
• This is useful as it allows teachers to see who should be attending their lessons.
• Data of attendance can then be easily analysed.
Exam • Exam Timetables can be produced using management systems and teachers who
Timetables are not teaching could be easily allocated to invigilate exams.
Creating • Timetables can be produced using management systems.

Timetables or • They are generally quicker to create and less prone to errors compared to a paper
based system.
Cover
• Timetables can also be produced cover classes when teachers are absent and lessons
need to be covered.
Learner • Teacher are able to log student data (grades/applications/reports/behaviour) into

Performance a school management system.
• This data is then available (central storage of data) to anyone other members of staff.
• The data can analysed and reports can be produced.
Benefits to • Parents are able to log in and access student reports online.
school/parents • They can be kept up to date about exam results and general student progress in
subjects.
• Also they can receive immediate feedback. There would be no need for printed
reports which would reduce costs.

ICT Applications
A school has introduced a system so that parents of its students can access data
about their children.
Give three reasons why the school has introduced this system.
• To save printing costs of reports

• To ensure test results, etc. are received
by
• parents
To allow immediate feedback to parents
• after tests/exams
To keep parents up to date with child’s
progress/targets
Exam Question
ICT Applications
6.8 Booking Systems
Online booking systems use real time processing which allows users to Input: User will select the
make and confirm bookings instantly. Once payment has been requirements of the
received and booking is confirmed then booking can not be double booking. E.g. date of flights,
booked.
Example Uses: Airports, Location etc.
Transport: Flight, Trains and Buses
Entertainment: Theatre, Cinema and Stadium Processing : involves
Accommodation: Hotels, Apartments and Villas checking if bookings are
Advantages: Disadvantages possible (availability)
• User can check availability of tickets • It may be difficult to cancel a booking
and compare prices on comparison and get your money back. Outputs:
websites. booking confirmations
• Online booking services have known
• Confirmation message is sent to crash to high level of traffic to the /rejections
instantly once payment has been website. alternatives/Payment
authorised.
• You are unable to receive specific
• They prevent double booking as the
advice on your booking if it is done
process is real time. This means if online.
somebody makes a booking then it
instantly becomes unavailable. • Websites may not be user friendly
• You may receive special offers if and
may make the booking process more
difficult.
you regularly book using a
particular booking website.

ICT Applications
Describe the inputs and processing involved in booking flight tickets online?
Key Words: Requirements, availability, confirmation, payment, booking reference, e-ticket

The customer would first select the number of tickets (requirements), arrival and destination
airport, date and time of the flight. The computer will then check for the availability of the
seat. Alternative tickets may be offered on a different day if tickets are not available. The
customer will then select and confirm the ticket and the payment details will be entered.
Once the payment has been processed a booking reference will be generated and the seats
will become unavailable. Confirmation (e-ticket) could be sent over email.
Exam Question
ICT Applications
Give four advantages of using online booking systems for the customer rather than
using manual systems.
•
Speeds up the booking process

• Customers may not have to travel to the theatre so save money in
• travelling
Customers may not have to travel to the theatre so save time in
• travelling/queuing
• Can make/cancel/change a booking at any time
• Can book several shows at same time
Booking can be carried out anywhere
Exam Question
ICT Applications
A theatre manager wishes to introduce an online booking system. A programmer
has been asked to write the software. She could continue on her own or discuss the
ideas with the theatre manager.
(a)Explain why is it beneficial to discuss ideas with the theatre manager
before writing the software.
• The programmer will not be familiar with the workings of the theatre/to
understand the requirements of the system
• The solution may be easy for the programmer to use but not the users/make
it user friendly
• The theatre manager is paying the programmer
• The theatre manager may want enhancements that the programmer has not
thought of
• The progress of the solution needs to be checked with the theatre manager in
case the he/she changes his mind
• The budget needs to be discussed (as it may involve purchasing new
hardware/software)
• The timescale needs to be discussed
Exam Question
ICT Applications
6.9 Banking Applications
Electronic Fund Transfer (EFT) allows money to be transferred electronically from one account to
another.
An example of EFT is when an Employer pays their employees their salaries.
Employee 1
Business
+ £1500
Bank
EFT instruction to pay Employees
Account Employee 2
£4500
+ £1500
-£4500 Employee 3
+ £1500
Advantages: Disadvantages
• No physical money is transferred which makes • Money could be transferred from the incorrect
the transfer more secure. account.
• Transfer of salaries can be regulated by the • Incorrect amount of money could be transferred
government (e.g. Used in Qatar to ensure by mistake.
employers are paying their employees on time). • If you have a poor credit rating then you may not
• Customers can set up standing orders (direct be declined to use EFT as a method of payment
debit) to pay bills on specific dates. (e.g. paying monthly for a mobile phone contract).

ICT Applications
Processing credit/debit card Transactions
Customer’s Bank (Card Holder’s Issuing Bank)

Merchants' Bank (Acquiring)
Funds are transferred

Checking
Funds
Funds are not available
Transaction
Using details on the Declined. Card holder is paying by
card the Merchant’s Card.
bank contacts the Card will be place in
card holders bank to chip and pin reader.
check for sufficient Merchant Card Holder
Pin will be entered to
funds to complete the proceed with
transaction. transaction.

ICT Applications
Describe the processing that takes place at POS to make payment using a debit card?
Key Words: PIN, Validity of Card, Account, Balance, Sufficient funds, Transfer, declined, receipt
Once the customer has entered the Pin it will be compared to Pin on the Chip. IF the Pin is
correct than the card will be checked to see if this is valid (not stolen and expired). If the card
is valid than the transaction will continue. Using the account details on the chip the shops
computer will make contact with the customer’s banks. Checks will be made for sufficient
funds to complete the transaction. If funds are available then the amount will be transferred
fro m the c usto mer ’s ac co unt to the shops ac co unt. If funds are not available then
the transaction will be declined. If the transaction has been successful the receipt will be
printed and the card will be given back to the customer.
Exam Question
ICT Applications
When a debit card is read by computer, data on the card can be used
for transactions.
List four items of data found on a debit card which can be read by
computer.
• Sort code
• PIN
• Debit card number
• Bank account number
• Valid from
• Expires end
Exam Question
ICT Applications
Contactless debit cards are replacing standard debit cards. Some countries
are introducing contactless debit card transactions at ATM machines. Discuss
the advantages and disadvantages to the bank of using these cards at an
ATM.
Advantages: Disadvantages:
• The cards last longer as they are not • The cost of producing new cards
in contact with the machine • The cost of producing new readers
• Attracts new customers • The cost of re-writing the ATM
• Reducing the cost of replacement software
cards • They are liable to fraud therefore
• Reduction in fraud as less money compensate customers... ...Increasing
taken out costs
• Cards not retained therefore less cost • Less money removed at transaction
for replacements therefore potentially more small
• The transactions are faster transactions
...Increased administration
...Increased hardware use
Exam Question
ICT Applications
Contactless debit cards are replacing standard debit cards. Some countries
are introducing contactless debit card transactions at ATM machines. Give
three disadvantages to the customer of using these cards at an ATM.
• The card may be read accidently

• Only small amounts can be withdrawn
• More chance of fraud if card is stolen/lost
• May not be able to use the ATM as not everyone will be contactless due to
• cost
Devices can read the cards wirelessly to steal money
Exam Question
ICT Applications
Clearing of Cheques
You receive a check

The cheque is then The cheque data is
from your employer
sent to a clearing sent electronically to
which you pay into
centre where it is the payers bank (the
your bank account. You person who wrote
sorted and cheque
Employer
data is created. the cheque).
Money is received If funds are

After 4 working The payers bank
electronically from available then the checks for fraud and
days the person money is sent
the cheque payers
who paid in the also checks if
bank and deposited electronically to sufficient funds are
cheque should the bank of the
into the account of
have access to available.
the person who paid person who paid in
the money.
in the cheque. the cheque.

ICT Applications
Bank cheques are sometimes used to pay bills.
(a)Name four pieces of information that the bank’s computer may read from the
bank cheque.
• Bank/city/branch code
• Cheque number
• Account number, Amount
• Account holder’s
• name/payee/drawer
Date written on the cheque
(b) Describe what is involved in the clearing of bank cheques which the bank has
collected in the course of the day.
• The cheques are sent to the clearing bank/centre

• The amount is read using OCR
• The bank code/branch code/sort code/cheque
• number/account
• number is read using MICR
• Sort the cheques
The cheque into
is scanned bank
using code
OCR and order
stored
Exam Question
ICT Applications
ATM (Cash machines) can be used for various purposes (including cash withdrawal/deposit,
checking/printing statement).
The PIN number is Customer may be asked to select a language.

compared with the PIN
stored in the chip. If Pin
is the same then the The customer types in the PIN.
customer can Proceed. Cash Withdrawal
If Pin is correct then the customer will select a Cash Deposit
If not customer will be service. Check Balance
requested to re enter Print Statement
the Pin. Phone Topup
If customer selects the Cash Withdrawal then they
The customer’s account
are requested to select an amount to withdraw.
is checked to see if it has
sufficient funds. If there are sufficient funds and the amount is
within the card limit the required notes are issued.
The amount is also
checked against the card
limit or daily withdrawal Customer is requested if they would like a receipt.
limit. The card is then returned to the customer.

ICT Applications
Banking Advantages Disadvantages
Online Customers can now access their bank • Can be accessed from • Internet connection
Banking accounts online on secure websites using various platforms and required.
used 24/7 including

authentication techniques. Some banks have
whilst on the move. • Less personable for
also developed online banking applications to
those who would
allow customers to access their accounts via • Save time and costs- prefer direct
mobile phones and tablets. No Travelling or money communication with
spent on travelling or a bank representative
Customers can use the on-line banking system parking. .
to: • Your account could
• Check their balance and print statements • Statements can be be hacked or
• Manage direct debits downloaded from a passwords stolen
• Transfer money internally and externally to given time period. from key logging
other accounts using EFT. software.
• Several layers of
• Apply for loans or credit cards.
authentication.
Phone Phone banking is very similar to online banking • Can talk directly to a • Call costs
in that customers can complete similar tasks. representative from • May be put on hold
Banking the bank. for a long time.
Customers will have to enter in their account
• Ask additional queries • Call times (9am-5pm)
details to authenticate them to the system. which are not available are not flexible.
Then they will have to select from various online.
options by the specified numbers keys.

ICT Applications
People can manage their bank accounts in different ways. One way is telephone
banking. A person wishes to use telephone banking without speaking to an operator
to transfer money from one bank account to another. Describe the steps needed to
do this.
• User telephones the bank telephone centre

• System asks for the long number on the credit / debit card / sort code and
• account number / customer ID number
• The user taps out on the phone keypad / speaks the number
• System asks for certain characters in a password and other security details
• The user taps out the characters asked for
• System ask for options required
• Users tap in the number (transfer from one account to another)
• System asks number of account transfer from …User taps in account number
• System connects with the bank account …System asks for number of account transfer money
• to
• User taps in account number
• System asks amount to transfer
• User taps in the amount
• System asks when the transfer should happen
• The user
System asktaps in confirm
you to the dateit/sends a text message / send email
Exam Question
ICT Applications
6.10 Computers in Medicine
Type Use of Technology Advantages Disadvantages

Information • Keeping patient records in a • Computers can take more • Equipment could
Systems in database so correct Medicine accurate an more frequent be expensive.

diagnosis can be given readings of patients. • Training would
according to patients • Computers can respond be required.
medical history. quicker to any changes in • Regular
patients condition. maintenance of
• Monitoring patients (vital
signs) using measure and • Staff are available to the system would
complete other tasks. be required.
control systems
• The use of expert systems to • Data can be stored in • Systems could
central place. stop responding.
diagnose an illness.
• Saving physical space
which would be required
to stored paper records.
3D printers • Surgical and Diagnostic Aids • Printing is relatively • Technology is still
• Prosthetics cheap. in the earl stages
• Tissue engineering • Printing can be faster of development.
• Artificial blood vessels compared to • Limited selection
• Designs of medical tools and manufacturing parts. of materials
equipment available.

ICT Applications
6.11 Computers in Libraries
Computers are used in libraries to keep a track on which books have been borrowed by which
members. Databases software is typically used to store details of the books and the members.
Issuing of Books Advantages:

• Books and members can be identified by unique • Data from the books
barcodes which can be scanned in directly by and the members are
barcode scanners. entered quickly and
• When a book is taken out the bar code is scanned more accurately
as well as the barcode on the members card. compared to manual
• The due date is worked out by the date the methods.
book was issued.
Automatic Processing Advantages:

• The library’s database is checked on a daily basis • Members would be
to check which books are due. able to extend the
• Liberians can quickly check if a book is available to lease period on the
be borrowed or could provide specific dates to book borrowed
members when the book will be returned. online.
• Automatic emails could be sent to the members to
remind them of the due date.

ICT Applications
6.12 Expert Systems
Expert systems are used to provide expert opinions without the need for the expert by using a
system allowing the user to query the knowledge base to find solutions to their problems.
User interface - Will allow user to knowledge base - Information is

interact with the system to receive developed by experts based on
feedback. a collection of facts and rules.
For example the user may be prompted For Example a medical diagnosis expert
to enter their symptoms for a medical system would be developed by doctors.
issue.
User
User Inference
Knowledge base
Interface Engine
Inference Engine - The Inference engine will act as a search engine.

It will query the knowledge base to match the query of the user. Rules Base
Additional questions could be to user to provide a more specific
diagnosis

ICT Applications
6.12 Expert Systems
Creating an Expert System
1. Data is gathered/collected from experts to create a knowledge base.

2. The rules base is designed/created based on the information from the knowledge base.
3. A user interface screen is designed/created which would provide the user with the ability to
interact with the system.
4. The inference engine is designed/created as link between the user interface and the
knowledge base.
5. The system is tested.
Examples
Car Diagnostic Expert System
Car engine will connected to the diagnostic expert system.

The expert system will automatically test certain functions
and provide feedback for repair.

ICT Applications
A mining company has asked a knowledge engineer to devise an expert system to help them
with their prospecting for valuable minerals. Describe how this expert system would be
created. Key Words: Experts, Knowledge base, Rule base, user interface, inference engine
Data is collected from the experts to develop the knowledge base. The rules base is then
created based on the information from the knowledge base. The user interface screen is
designed/created which would provide the user with the ability to interact with the system.
The inference engine is designed/created as search engine between the user interface and the
knowledge base. The system is then tested.
Doctors often use expert systems to diagnose illnesses of patients. Describe how an expert
system diagnoses illnesses. Key Words: user interface, inference engine, knowledge base,
rules based
User will interact with the user interface and enter their symptoms. Inference Engine will act
as a search engine and compare the data which is held in the knowledge base. The knowledge
base will use the rules base to give an appropriate match. Further questions could be asked
via the user interface until the system suggest a probable illnesses.
Exam Question
ICT Applications
Describe three benefits of the doctor using an expert system to help diagnose a
patient’s illness.
• An expert system may help the doctor make a more accurate diagnosis
• An expert system uses data from many experts therefore it contains

more knowledge than a single doctor
• Cheaper than regularly re-training the doctor
• The expert system's knowledge may be more up to date than the knowledge of
a single doctor
• Cheaper than employing many specialists
• The diagnoses given are more consistent
Exam Question
ICT Applications
Describe how an expert system can be used to suggest car engine fault diagnoses.
Any five from:

• Enter data into/use the interactive user interface
• Questions are asked about the car engine fault

• The user answers the questions/Yes or No answers to the questions are typed
• in
• Further questions are asked based on the previous answers
• The inference engine compares data
Compares
….using the rulesdata withofthat
base/set rulesheld in the knowledge base
….until it finds a match/matches
found
• System suggests probabilities/possible solutions
• The explanation system explains how the solutions were arrived
at
Exam Question
ICT Applications
6.13 Computers in the Retail Industry
POS (Point of Sale) is the place a transaction takes place. Customers can pay by cash or using
their debit/credit cards. Stock control systems can automatically update stock records when
items are purchased at the POS.
Bar code scanner -6

purchased
used to scan
items at POS cans
Current Stock Level 6 Cans Purchased Current Stock Level 4

10 When goods are sold at the POS the
stock
control system is automatically updated.
If Stock Falls Below 5
(Pre-set)
True: Reorder 10
Order is sent to the
Stock control system automatically suppliers.
updates the stock levels adding the The suppliers send a delivery (10 Suppliers address details
delivered goods. stored in database.
cans of beans) to the store.

ICT Applications
Describe the processing that takes place in an automatic stock control system?
Key Words: POS, Stock Level deducted, Preset, Lower, order, delivery, stock level
updated
Stock is purchased at the POS and the amount is automatically deducted from the overall stock
level. If the stock level falls below (lower) than the pre-set value then an automatic delivery
request is sent to the supplier. A preset value will be reordered and will arrive in the next
delivery. The stock levels will automatically update.
Exam Question
ICT Applications
EFTPOS (Electronic Fund Transfer Point of Sale) is when a customer uses a card to complete a
transaction.
1. Customer gives bank card to cashier at POS.
2. The cashier enters the card in to the chip and pin reader
Pin entered has and confirms the value of the purchase.
to be correct for
the transaction 3. The customer is requested to enter their pin. If Pin
to continue. The matches the Pin stored on the chip then the transaction can
card will also be continue.
checked for
validity (expiry 4. The shops computer will use the account details on the
If funds are not available a
date/stolen). chip to connect to the customers bank account and check
the balance. declined message will be
sent to the stores
5. If funds are sufficient then the transaction will be computer. The cashier will
approved.
then request for another
method of payment
6. The purchase amount is subtracted from the customer’s
account and deposited into the shops banks account.
7. Once the transaction is complete receipt will be printed.

The cashier will give the card and receipt to the customer.

ICT Applications
Internet banking and shopping is becoming more popular to users due to the development of
the internet and the advancement of mobile internet technology.
• Internet is now available on more platforms including • Online accounts could be hacked/cards
applications available on phones and tablets. details could be stolen.
• Internet can be accessed 24/7. • Users require a internet connection and
• No need to travel (saves money on travel/parking) need to be computer literate.
• Saves time (No need to que in the banks or shops) • Lack of socialising/exercising.
• Access to wide range of goods on the internet. • You can not see the goods before you
• Useful for individuals who find it difficult to travel and buy (try on clothes).
goods can be delivered directly to your home. • Delays in delivery.
• People can spend more time doing other leisure
activities.
Effect on the company
• Less retail outlets required which means no rent or utility costs.
• Less staff required in retail outlets however specialist staff would have to be
employed to maintain the website and run the dispatch department.
• Online presence would attract more customers (Global).
• Lack of customer interaction.

ICT Applications
6.14 Recognition Systems
Recognition Systems are used to directly enter data into a computer system. Recognition
systems tend to be more accurate and quicker method of entering data into a computer system
compared to manual methods.
MICR Magnetic ink which are found at the bottom of the checks
are scanned in to MICR (Magnetic Ink Character Reader).
Pencil or pen marks are scanned in by the OMR (Optical

OMR Mark Reader).
Scanned text is converted into a format which can be

OCR
edited.
Uses radio waves to capture and store information on a

RFID tag.
Sensors are used to detect a car (if its gone over the line)
Number Plates and a signal will be send to the microprocessor to take
the image of the number plate.

ICT Applications
Describe how RFID technology reads the details from the chip.
• The chip is presented near a computer with a radio-frequency scanner

• The scanning antenna puts out radio-frequency signals in a relatively short
• range.
• It provides a means of communicating with the transponder/the RFID tag
• The scanning device provides energy…
• …so that the chips can broadcast the information in them…
…for the computer to read.
Explain why RFID technology is used for reading data from passports.
• More secure than a traditional passport as biometric measurement data difficult

to forge
• Counterfeits can be more easily identified than non-RFID passports
• More rapid flow at security check points/quicker than reading it manually
Exam Question
ICT Applications
When a bank cheque is presented to a bank it is sent off to a cheque clearing centre.
Give three items of information that are pre-printed on the cheque in magnetic ink.
• Account number
•
Bank/branch sort code

• Cheque number
Describe how MICR is used to read these details from the cheque.
• Requires a special Magnetic Ink Character reader/scanner/Details are scanned

• The magnetic ink on the cheque passes over a magnet in the reader/scanner which
• charges/magnetises the ink
• The MICR reader/scanner then reads the magnetic signal given out by the magnetic ink
• characters on the cheque.
• Each character produces a unique signal which is read and translated by the MIC
reader
Explain why magnetic ink is used rather than bar codes on a cheque.
• More difficult to forge

• Even if overwritten/damaged can still be read by
• computer
Information is human readable Exam Question
ICT Applications
A student exam answer sheet consists of boxes which the student shades in to
indicate their choice of answer.
Apart from the details of the test and the lozenges, give two items of
information, essential to the student, that are pre-printed on the answer sheet.
• Student id number/prompts for student number

• date of birth
• student name
• Instructions on how to complete the form
• Question numbers
• Centre number/Centre name
Describe how Optical Mark Recognition is used to process the details from the form.
• Dedicated scanner device shines a beam of light onto the form

• Light is reflected back to sensors
• Marks reflect less light so sensors used to identify position of
• marks
Computer compares these with correct answer positions
Exam Question
ICT Applications
A student exam answer sheet consists of boxes which the student shades in to
indicate their choice of answer.
Describe the drawbacks of using Optical Mark Recognition

• If the marks don't fill the space completely they may not
be read correctly/overfill the space/smudged
• If the marks are not in a dark enough pencil they may
not be read correctly
• If more than one lozenge shaded in result is invalidated
• Only suitable for recording one out of a selection of
answers, not suitable for text input
• Have to use prepared forms which may be expensive
• Examinations could consist of mainly multiple-choice
questions changing the nature of what is being tested
Exam Question
ICT Applications
6.15 Monitoring and Tracking Systems
Reasons for Monitoring and Tracking Systems:

• Surveillance (Potential Criminals/Terrorists)
• Tracking released prisoners to ensure they stay within an agreed location(Ankle monitors)
• Monitoring customers buying patterns.
Key Logging Call Monitoring

Key logging software monitors which keys Calls can be monitored by police as part of
surveillance operations.
have been pressed. Passwords and personal
details can be obtained for malicious Calls may also be monitored as training tool
purposes by hackers. in call centres to improve employees
performance the quality of the customer
service.
Cookies Number Plate Recognition

When a user visits a website a cookie is Number plates can be tracked by cameras
created which could store the user browsing situated in specific locations to keep track
preferences: of whereabouts of a specific individuals to
• Language settings whom the car is licenced too.
• Items in the shopping cart
• Links which have been click on
Cookies essentially leave an electronic
footprint on user browsing habits.

ICT Applications
A new toll road that drivers pay to use has just opened. The company that owns
the
road uses Electronic Number Plate Recognition Systems to collect payments from
drivers automatically. Describe how an Electronic Number Plate Recognition
System
works.
Key Words: CCTV cameras, Number plate captured, OCR, database, car owner
The system has CCTV cameras. The images and the text from the number plate are captured by
details
the camera. The system uses optical character recognition to input the data into the computer
system.
The number plate is checked against its database to find the car o wner ’s detai ls . Using
the car owner details the payment can be processed.
Exam Question
ICT Applications
Key-loggers are thought to be security risks but they can be used to monitor and track the use
of employees on a computer system. Describe how a key-logger monitors computer usage.
• A key-logger records the key strokes of a person using the computer

• Transfers / transmits the data back to the supervisor / manager

• The supervisor can then monitor what the employee has been doing / how
hard they have been working
A small minority of employees in a company have been using the computers for non-business
use, so the company has had to introduce other methods of monitoring their use of ICT. Apart
from key-logging list three other ways that employees could be monitored in their use of ICT.
• Monitoring phone call usage, Monitoring emails

• Monitoring the time spent on and websites
• visited
• Monitoring where employees log in / log out
• Monitor the amount of storage space used
Monitoring where they send data to print
Exam Question
ICT Applications
6.16 Satellite Systems
GPS (Global Positioning Systems)

GPS can determine a specific locations using satellite navigation systems.
• Cars, Ships, Planes can use GPS when navigating to specific locations.
• Walkers to locate position on hills/mountains.
• Used by runners to calculate distance.
Advantages: Disadvantages
• Drivers do not have to use maps • Loss of signal
• GPS can re-route and find quickest • Maps have to be updated (New roads
routes. may not be shown)
• Can provide useful locations of
amenities (e.g Petrol stations)
• Typically four satellites must be visible to the receiver.

• Calculates the distance from a receiver to the satellite.
• Calculates the position of the receiver.
ICT Applications
Describe how a satellite navigation system (sat nav) in a motor vehicle would
calculate the quickest route from Destination A to Destination B.
Key Words: Destination inputted, Position of motor vehicle calculated using

data
from 4 satellites, Algorithm calculates distance from A to B, traffic, road speeds
Destination B is input by driver. The Position of the motor vehicle at A is calculated using GPS
using data transmitted from 4 satellites. Algorithm calculates shortest distance from A to B.
The algorithm makes allowances for traffic and takes into account average road speeds to
calculate the time it would take to reach the destination.
Exam Question
ICT Applications
6.16 Satellite Systems
GIS (Geographic Information System)

GIS allows for potential locations to be analysed based on specific queries.
GIS will allow users to see specific details on a location:

• Road Networks GIS will then combine these
• Community Services (e.g. Schools) specific details and allow the
• Environmental Features (e.g. Rivers) user to specify certain criteria
• Properties Details (e.g. rental about a particular location.
properties)
Business can use GIS to identify a suitable location for their

business taking into consideration:
• Road links which could be easily accessible for customers and
suppliers.
• Proximity of Customers to potential retail outlets.
• Availability of potential retail outlets mapped by the GIS to give
options to the business.
• Environmental features to avoid being close to flood risk zones.

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ICT IGCSE Theory – Presentation

6.5 Modelling applications

MR. BENJAMIN ADU APPIAH

advertising campaign to target a specific target audience. Text Formatting

MR. BENJAMIN ADU APPIAH

Computer Based Cartoons (Animations)

MR. BENJAMIN ADU APPIAH

Mobile Based Voice Over Internet Protocol

When voice calls

MR. BENJAMIN ADU APPIAH

Advantages of Data Handling Applications for Storing Data:

• Data can be displayed or printed in different formats.

Address Lists Surveys School Records

Club/Society Records Libraries

MR. BENJAMIN ADU APPIAH

Role of Measurement Applications 1 - Input devices called

data from sensors are measured in analogue. The

Green Sensors are placed in the green house to measure

MR. BENJAMIN ADU APPIAH

Why Use Computers to Measure Things?

• Readings are more accurate compared to

MR. BENJAMIN ADU APPIAH

Role of Microprocessor in Control Applications 1 - Input devices called

inputted by the user.

MR. BENJAMIN ADU APPIAH

Green House (Temperature Example)

Examples in a Green House

MR. BENJAMIN ADU APPIAH

The developers have used the results from the model to

MR. BENJAMIN ADU APPIAH Sensors

Graphs showing levels of

A Sensor A compared to the previous

Graphs showing levels of

Describe the role of the microprocessor in controlling the oven temperature.

Tip: In this question you have to

write out the remaining steps.

1st: Work out how many more steps

MR. BENJAMIN ADU APPIAH

Tip: They may actual ask you to write

MR. BENJAMIN ADU APPIAH

A computer model is a model which would replicate (simulate) the functions of a

To save costs and time To train people how to

Why we use Computer Models?

Type of Modelling Application

• Before buildings are constructed simulations take place to ensure

• A traffic light simulator looks at the flow of traffic (data captured

MR. BENJAMIN ADU APPIAH

Cheaper than building the real thing

How Are Robots Used in a Factory?

MR. BENJAMIN ADU APPIAH

 Work 24/7 – same consistency and  Expenditure

MR. BENJAMIN ADU APPIAH

• More likely to be reliable as it is known that the device will work

A robot is used as a computerised postal delivery system. It drives around the

• The data from the sensor is compared to the pre-set value

School Management Systems are

register for that particular period.

Creating • Timetables can be produced using management systems.