| Acronym | Meaning |
 | IY | Iraqi-Saudi Neutral Zone (FIPS 10-4 Territory Code; Obsolete 1993) |
 | 4WD | Four Wheel Drive (cf. AWD) |
 | WHO | World Health Organisation |
 | ACS | Affiliated Computer Services (NYSE ACS) - American Cancer Society - American Chemical Society - Association Of Caribbean States |
 | IJWP | Interim Joint Warfare Publication |
 | LIFO | Last In |
 | IPR | In Progress Review - Intellectual Property Rights - Intelligence Production Requirement |
 | AOR | Area Of Responsibility |
 | DSWA | (U.S.) Defense Special Weapons Agency |
 | YUG | Former Yugoslavia (ISO 3166 Trigram |