| Acronym | Meaning |
| DID | Direct Inward Dialing |
| DPMI | DOS Protected Mode Interface |
| ANSI | American National Standards Institute |
| MDC | Metadata Coalition |
| MIF | Management Information Format |
| ACTA | America's Carriers Telecommunications Association |
| MBR | Master Boot Record |
| RIP | Regulation Of Investigatory Powers Act |
| PGA | Professional Graphic Adapter |
| CAE | Computer-Aided Engineering |