| A | B |
|---|
| AC | Alternating Current |
| ACL | Access Control List |
| ACPI | Advanced Configuration Power Interface |
| ACT | Activity |
| ADSL | Asymmetrical Digital Subscriber Line |
| AGP | Accelerated Graphics Port |
| AHCI | Advanced Host Controller Interface |
| AP | Access Point |
| APIPA | Automatic Private Internet Protocol Addressing |
| APM | Advanced Power Management |
| ARP | Address Resolution Protocol |
| ASR | Automated System Recovery |
| ATA | Advanced Technology Attachment |
| ATAPI | Advanced Technology Attachment Packet Interface |
| ATM | Asynchronous Transfer Mode |
| ATX | Advanced Technology Extended |
| AUP | Acceptable Use Policy |
| A/V | Audio Video |
| BIOS | Basic Input/Output System |
| BNC | Bayonet-Neill-Concelman or British Naval Connector |
| BTX | Balanced Technology Extended |
| CAPTCHA | Completely Automated Public Turing Test to tell Computers and Humans Apart |
| CCFL | Cold Cathode Fluorescent Lamp |
| CD | Compact Disc |
| CD-ROM | Compact Disc-Read-Only Memory |
| CD-RW | Compact Disc-Rewritable |
| CDFS | Compact Disc File System |
| CFS | Central File System or Common File System or Command File System |
| CIFS | Common Internet File System |
| CMOS | Complementary Metal-Oxide Semiconductor |
| CNR | Communications and Networking Riser |
| COMx | Communication Port (x=Port Number) |
| CPU | Central Processing Unit |
| CRT | Cathode Ray Tube |
| DAC | Discretionary Access Control |
| DB-25 | Serial Communications D-Shell Connector, 25 Pins |
| DB-9 | 9 Pin D Shell Connector |
| DC | Direct Current |
| DDoS | Distributed Denial of Service |
| DDR | Double Data Rate |
| DDR RAM | Double Data Rate Random-Access Memory |
| DDR SDRAM | Double Data Rate Synchronous Dynamic Random-Access Memory |
| DFS | Distributed File System |
| DHCP | Dynamic Host Configuration Protocol |
| DIMM | Dual Inline Memory Module |
| DIN | Deutsche Industrie Norm |
| DLT | Digital Linear Tape |
| DLP | Digital Light Processing |
| DMA | Direct Memory Access |
| DMZ | Demilitarized Zone |
| DNS | Domain Name Service or Domain Name Server |
| DoS | Denial of Service |
| DRAM | Dynamic Random-Access Memory |
| DRM | Digital Rights Management |
| DSL | Digital Subscriber Line |
| DVD | Digital Video Disc or Digital Versatile Disc |
| DVD-RAM | Digital Video Disc-Random-Access Memory |
| DVD-ROM | Digital Video Disc-Read-Only Memory |
| DVD-R | Digital Video Disc-Recordable |
| DVD-RW | Digital Video Disc-Rewritable |
| DVI | Digital Visual Interface |
| ECC | Error Correcting Code or Error Checking and Correction |
| ECP | Extended Capabilities Port |
| EEPROM | Electrically Erasable Programmable Read-Only Memory |
