| Acronym | Meaning |
| MAPI | Messaging Application Programming Interface |
| POSIX | Portable Operating System Interface For UNIX |
| HTML | Hypertext Markup Language |
| HSM | Hierarchical Storage Management |
| RC4 | RC4 Stream Cipher (Rivest Cipher 4) |
| IX | Internet Exchange |
| SDH | Synchronous Digital Hierarchy |
| PURL | Persistent URL |
| SLIP | Serial Line Internet Protocol |
| MRC | Magneto-Resistive Cluster |