| Acronym | Meaning |
| DIZ | Description In ZIP |
| UMB | Upper Memory Block |
| TOPS | Transparent Operating System |
| DLC | Data Link Control |
| RADIUS | Remote Authentication Dial-In User Service |
| BCC | Block Check Character |
| WAI | Web Accessibility Initiative |
| SBB | Storage Bridge Bay Working Group |
| MPI | Message Passing Interface |
| MAPI | Messaging Application Programming Interface |