| Acronym | Meaning |
 | WG | Working Group - Wade-Giles |
| CATS | Computer Active Technology Suspension |
| IBS | Irritable Bowel Syndrome |
| IISS | International Institute For Strategic Studies |
| KPNO | Kitt Peak National Observatory |
| IFO | Identified Flying Object (see Also UFO) |
| ZAF | South Africa (ISO 3166 Trigram) |
| IRM | Illinois Railway Museum - Inzhenernaya Razvedyvatelnaya Mashina (Russian ?????????? ???????????????? ?????? |
| PGD | Pre-implantation Genetic Diagnosis |
| BOAC | British Overseas Airways Corporation (predecessor Of British Airways) |
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