| Abbreviation | Definition |
|---|---|
| ANCA | Ambient Noise Controled Amplifier |
| ANL | Automatic Noise Limiter |
| ANN | Artificial Neural Network |
| ANOVA | ANalysis Of VAriance |
| ANSI | All New Small Integration |
| ANSI | American National Standards Institute |
| ANSWERS | Autonomous Nano-electronic Systems With Extended Replication and Signalling |
| AO | Acousto Optic |
| AO | Alpha Oscillator |
| AO | Always Open |
| AO | Always Oscillating |
| AO | Analog Out |
| AOC | Active Optical Cable |
| AOE | Adjustable Objective Electronic |
| AOEE | Advanced Optoelectronics for Energy and Environment |
| AOI | Applied Optoelectronics Inc |
| AOI | Automatic Optical Inspection |
| AOM | Acousto Optic Modulator |
| AOQL | Average Outgoing Quality Level |
| AOS | Adaptive Optimization System |