| Acronym | Meaning |
| PINF | People In Need Foundation (Czech Charitable Organisation) |
| BASIC | Beginner's All-purpose Symbolic Instruction Code (acronym Was Added Later |
| Q4 | Fourth Quarter |
| NISCAP | NSA Information System Certification And Accreditation Program |
| YJ | Yottajoule |
| INSAR | Interferometric Synthetic Aperture Radar |
| BUAV | British Union For The Abolition Of Vivisection |
| FISH | Fluorescence In-Situ Hybridisation |
| HRV | Croatia (ISO 3166 Trigram) -High Resolution Visible |
| A | Atto |