Found 1 abbreviations in 2 groups
| A4: Meaning | Category |
| A4 | many, including a European standard office paper size; see entry | Acronym |
Abbreviations similar to a4
- AHA - American Hospital Association … or American Heart Association
- AI - Aortic insufficiency
- AA - anti-aircraft
- AAA - anti-aircraft artillery "Triple A"
- AE - action express
- Ah - Ampere hour
- AO - Area of operations
- AOI - Arab Organisation for Industrialisation
- AWE - Advanced Warfighting Experiment
- AEW - Air Expeditionary Wing
- AU - Air University
- AW - Airlift Wing
- AAW - Anti-Air warfare
- AOW - Auxilliaryman of the Watch
- AAO - American Academy of Ophthalmology
