| Acronym | Meaning | Explanation |
| ACL | Access Control List | A list defining permissions attached to an object specifying who can access it and what operations they can perform. |
| ADC | Analog-to-Digital Converter | Converts analog signals into digital data. |
| ADF | Automatic Document Feeder | A feature of scanners or copiers that automatically feeds multiple pages for scanning or copying. |
| ADSL | Asymmetric Digital Subscriber Line | A type of DSL broadband communications technology used for connecting to the internet. |
| AGP | Accelerated Graphics Port | A high-speed point-to-point channel for attaching a graphics card to a computer’s motherboard. |
| AIFF | Audio Interchange File Format | An audio file format standard used for storing sound data on computers and other devices. |
| AIX | Advanced Interactive Executive | A series of proprietary Unix operating systems developed by IBM. |
| ANSI | American National Standards Institute | Oversees the development of voluntary consensus standards for products, services, systems, and personnel in the United States. |
| API | Application Program Interface | A set of routines, protocols, and tools for building software and applications. |
| ARP | Address Resolution Protocol | A network protocol used to find the physical address associated with a given IP address. |
| ASCII | American Standard Code For Information Interchange | A character encoding standard for electronic communication representing text in computers. |
| ASP | Active Server Page | A server-side script engine for dynamically-generated web pages. |
| ASP | Application Service Provider | A business providing computer-based services to customers over a network. |
| ATA | Advanced Technology Attachment | A standard interface for connecting storage devices such as hard drives and CD-ROM drives. |
| ATM | Asynchronous Transfer Mode | A networking technology that transfers data in cells or packets of a fixed size. |
| BASIC | Beginner’s All-purpose Symbolic Instruction Code | A high-level programming language designed for easy learning and use. |
| BCC | Blind Carbon Copy | A way to send an email to multiple recipients without them seeing each other’s addresses. |
| BIOS | Basic Input/Output System | Firmware used to perform hardware initialization during booting and to provide runtime services. |
| BLOB | Binary Large Object | A collection of binary data stored as a single entity in a database management system. |
| BMP | Bitmap | An image file format for storing bitmap digital images. |
| CAD | Computer-Aided Design | Software used by architects, engineers, and others to create precision drawings or technical illustrations. |
| CC | Carbon Copy | An email feature allowing sending copies of a message to others besides the main recipient. |
| CCD | Charged Coupled Device | A sensor for capturing images, commonly used in digital cameras. |
| CD | Compact Disc | A digital optical disc used to store data, audio, or software. |
| CD-R | Compact Disc Recordable | A writable CD that can be recorded once. |
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