| Acronym | Meaning |
| PHP | PHP Hypertext Preprocessor (Personal Home Page) |
| MPI | Message Passing Interface |
| HFS | Hierarchical Filing System |
| SIG | Special Interest Group |
| IX | Internet Exchange |
| DDOS | Distributed Denial-of-Service |
| SIP | Single In-line Package |
| GREP | Generalized Regular Expression Pattern-matcher |
| RISC | Reduced Instruction-Set Computing |
| PIO | Programmed Input Output |