| Acronym | Meaning |
| WIYN | Wisconsin Indiana Yale NOAO Telescope Consortium |
| A2C2 OR A?C? | Army Airspace Command And Control |
| ITA | Italian Language (ISO 639-2 Code) |
| IAFG | Information Assurance Focus Group |
| TWIP | Take What Insurance Pays - When A Surgeon Agrees To Accept A Lower Payment Than He Ordinarily Would For A Procedure And Not Charge The Patient The Difference |
| PWC | PieceWise Constant (describing A Mathematical Function) |
| IPR | In Progress Review - Intellectual Property Rights - Intelligence Production Requirement |
| AIRS | Aerometric Information Retrieval System (obsolete; Replaced With AFS) |
| FLIR | Forward Looking InfraRed (sensor) |
| KT | Kilotesla |