Operating Systems Overview
Operating Systems Overview
Operating Systems Overview
P2 grading criterion
Report –
Why do PC’s need an Operating System (OS)
Features and Functions of a OS
How are operating system used to facilitate
users?
Where to find the information?
Plenty of
info out
there!
What is an operating system?
Memory Management
Allocates memory to programs
Recovers memory after use
Prevents programs from accessing
memory allocated to another program
Manages virtual memory
Managing computer resources
Process Management
CPU can only do one thing at a time
O/S allocates CPU time to programs
Allows >1 program to run at a time
Prevents one program hogging the CPU
Gives impression of multi-tasking
Managing computer resources
Applications
Operating System
Hardware
Platform for application software
User Management
Device Management
Defragmenting
Updates / Patches
etc.
Networking
Comparison
1. How it works in Windows