| Acronym | Meaning |
| PGM | Pragmatic General Multicast / Pretty Good Multicast |
| BITNET | Because Its Time Network |
| MAN | Metropolitan Area Network |
| BBS | Bulletin Board System |
| PIM | Personal Information Manager |
| CODASYL | Conference On Data Systems Languages |
| MOO | Mud, Object Oriented |
| TSAPI | Telephony Service API |
| URI | Uniform Resource Indicator |
| NTSC | National Television Standards Committee |