| Abbreviation | Definition |
|---|---|
| AC | Antique Copper |
| AC | Associate Chain |
| ACAEP | American Council for Arcitecural Engineering Physics |
| ACC | Accumulator |
| ACC | AcronymAttic com |
| ACE | Air Circulating Embankment |
| ACES | Advanced Concept Ejection Seat |
| ACF | Activated Carbon Filter |
| ACFC | Air Cooled Flooded Chiller |
| ACFH | Animal Chatter Farm - Horse |
| ACFP | Arab Company for Fiber Products |
| ACFX | Air-Cooled Flooded Chiller |
| ACFZ | Arctic Cooling FreeZer |
| ACG | Additive Congruential Generator |
| ACG | All Condition Gear |
| ACH | Absorption Chiller Heater |
| ACID | Amstrad Cartridge Identification Device |
| ACL | Applied Color Label |
| ACLD | Active Constrained Layer Damping |
| ACM | Accumulated Call Meter |