English abbreviations from aavso to ab
- AAVSO ((organization) American Association of Variable Star Observers)
- AAW (Anti-Air warfare)
- AAWC (anti-air warfare commander)
- AAWCS (Anti-Air Warfare Combat System)
- AAWO (Asian American Women's Organization)
- AAWS (Anti Air Warfare System)
- AAWS-H (Advanced Anti-Armor Weapons System - Heavy)
- AAWS-M (Advanced Anti-Armor Weapons System - Medium)
- AAWU (Athletic Association of Western Universities)
- AAWV (American Association for Wartime Veterans)
- AAWW (Asian American Writers Workshop)
- AAWWS (Airborne Adverse Weather Weapon System)
- AAX (Araxá Airport)
- AAY (Al Ghaydah Airport)
- AAYA (Asian American Youth Alliance)
- AAZ (Quetzaltenango Airport)
- AB (Air Burst)
- A.B. (Artium Baccalaureus ("Bachelor of Arts"))
- Ab. (Abbas ("Abbot"))