Abdullah or Abdallah is the primary transliteration of the Arabic given name, Arabic: عبد الله‎, built from the Arabic words Abd and Allah (Allah itself composed of Al- and Ilah). The first letter a in Al-Ilah in its native pronunciation is often unstressed and commonly transliterated by u, a stressed a is often used as well, although any vowel can also be used. It is one of many Arabic theophoric names, meaning servant of God or God's slave. The feminine counterpart of this name is Amatullah.

Humility before Allah is an essential value of Islam, hence Abdullah is a common name among Muslims. In particular, the name of the Islamic prophet Muhammad's father was Abdullah.

It is also common among Arab Jews, especially Iraqi Jews. The name is cognate to and has the same meaning as the Hebrew Abdiel and, more commonly, Obadiah. There were two Jewish Rabbis in Medina before Islam came; they were Abdullah ibn Salam and Abdullah ibn Shuria. Abdullah ibn Saba was a Yemenite Jew during the spread of Islam. The word Allah exists in the Arabic Talmud and other Jewish scriptures.

Abdullah is an Arabic male given name which means "The Servant of God” which according to Sahih Hadith, one of those two names most liked by God. They are Abd-Allah or Abdullah & Abdur Rahman.

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‘Abdallah Mirza (also spelled ‘Abdullah Mirza) (after 1410 – June 1451) was a short-lived ruler of the Timurid Empire, which encompassed the territory shared by present-day Iran, Afghanistan, Pakistan, along with substantial areas of India, Mesopotamia and Caucasus.

As a member of the Timurid dynasty, Abdallah Mirza was a great-grandson of Timur, a grandson of Shahrukh Mirza and a son of Sultan Ibrahim Mirza. Granted the governorship of Fars by his grandfather, Abdallah Mirza found his position threatened by his cousin Sultan Muhammad bin Baysonqor during the 1447 succession crisis which followed Shah Rukh's death, and was forced to abandon the province. As a supporter of Ulugh Beg, he was imprisoned by 'Abd al-Latif following the latter's rise to power. When 'Abd al-Latif was murdered, he was released and made ruler of Samarkand, for which he was forced to lavish money upon the troops that supported him. Despite this, he did not enjoy widespread popularity.

During his relatively brief reign, a revolt created by Sultan Muhammad's brother Ala-ud-Daulah Mirza bin Baysonqor did not seriously threaten him, but a rising initiated by Abu Sa'id Mirza, whose home base, at the time, was in Bukhara, proved to be fatal. Marching from Tashkent to Samarkand with the support of the Uzbeks, Abu Sa'id Mirza defeated Abdallah Mirza and executed him in 1451, taking his place on the throne.

Abdullah (died c. 1359) was the leader of the Qara'unas (1358–1359) and the ruler of the Chagatai ulus (1358). He was the son of Amir Qazaghan.

After Qazaghan had taken control of the Chagatai ulus in around 1346, he appointed Abdullah as governor of Samarkand. During his father's lifetime, Abdullah led an expedition against Khwarazm, although Qazaghan had been against it. When the latter died in 1358 Abdullah succeeded him. Unlike his father, he had an active interest in the tribes of the northern part of the ulus. Qazaghan, whose power base had been in the southern portion of the ulus, had tended to leave the northern tribes alone; Abdullah was not content to do the same. The northern tribes bitterly resented his attempts to curtail their power.

Abdullah's decision to keep his capital in Samarkand proved to be his undoing. The Barlas and Suldus tribes, both located near the city, hated the prospect of a strong Qara'unas presence in their immediate vicinity. Together the leaders of the Barlas and Suldus, Hajji Beg and Buyan Suldus, revolted and drove Abdullah out of power; he returned to the territories of the Qara'unas and died soon afterwards. The victorious parties often cited Abdullah's treatment of Bayan Quli as a pretext for their revolt. Bayan Quli had been Qazaghan's puppet khan; soon after Qazaghan's death Abdullah desired Bayan Quli's wife and had him executed. In any case, Buyan Suldus was installed as amir of the ulus, while both Abdullah's brothers and Shah Temur, who had been raised by Abdullah to the khanship following Bayan Quli’s execution, were killed.

A name is a term used for identification. Names can identify a class or category of things, or a single thing, either uniquely, or within a given context. A personal name identifies, not necessarily uniquely, a specific individual human. The name of a specific entity is sometimes called a proper name (although that term has a philosophical meaning also) and is, when consisting of only one word, a proper noun. Other nouns are sometimes called "common names" or (obsolete) "general names". A name can be given to a person, place, or thing; for example, parents can give their child a name or scientist can give an element a name.

Caution must be exercised when translating, for there are ways that one language may prefer one type of name over another. A feudal naming habit is used sometimes in other languages: the French sometimes refer to Aristotle as "le Stagirite" from one spelling of his place of birth, and English speakers often refer to Shakespeare as "The Bard", recognizing him as a paragon writer of the language. Also, claims to preference or authority can be refuted: the British did not refer to Louis-Napoleon as Napoleon III during his rule.

An identifier is a name that identifies (that is, labels the identity of) either a unique object or a unique class of objects, where the "object" or class may be an idea, physical [countable] object (or class thereof), or physical [noncountable] substance (or class thereof). The abbreviation ID often refers to identity, identification (the process of identifying), or an identifier (that is, an instance of identification). An identifier may be a word, number, letter, symbol, or any combination of those.

The words, numbers, letters, or symbols may follow an encoding system (wherein letters, digits, words, or symbols stand for (represent) ideas or longer names) or they may simply be arbitrary. When an identifier follows an encoding system, it is often referred to as a code or ID code. Identifiers that do not follow any encoding scheme are often said to be arbitrary IDs; they are arbitrarily assigned and have no greater meaning. (Sometimes identifiers are called "codes" even when they are actually arbitrary, whether because the speaker believes that they have deeper meaning or simply because he is speaking casually and imprecisely.)

In computing, naming schemes are often used for objects connected into computer networks.

Naming schemes in computing

Server naming is a common tradition. It makes it more convient to refer to a machine by name than by its IP address.

CIA named their servers after states.

Server names may be named by their role or follow a common theme such as colors, countries, cities, planets, chemical element, scientists, etc. If servers are in multiple different geographical locations they may be named by closest airport code.

Such as web-01, web-02, web-03, mail-01, db-01, db-02.

Airport code example:

City-State-Nation example:

Thus, a production server in Minneapolis, Minnesota would be nnn.ps.min.mn.us.example.com, or a development server in Vancouver, BC, would be nnn.ds.van.bc.ca.example.com.

Large networks often use a systematic naming scheme, such as using a location (e.g. a department) plus a purpose to generate a name for a computer.

For example, a web server in NY may be called "nyc-www-04.xyz.net".