| Acronym | Meaning |
| MUD | Multiple User (or Multi-User) Dungeon (Dimension) |
| LDAP | Lightweight Directory Access Protocol |
| HP | Hewlett-Packard |
| XPS | XML Paper Specification |
| ABC | Atanasoff-Berry Computer |
| JCL | Job Control Language |
| PUP | Potentially Unwanted Program |
| MAU | Media Access Unit |
| ISO | International Organization For Standardization |
| CCITT | Consultative Committee For International Telephony And Telegraphy |