air - anti
- AND operator
- AND(-to)-OR circuit
- AND(-to)-OR circuit
- AND-NOT gate
- AND-OR gate
- AND-OR inverter
- AND-OR-invert gate
- androgynous docking assembly
- androgynous docking device
- androgynous docking mechanism
- androgynous periphery-type docking
- android
- androphage
- anechoic box
- anechoic chamber
- anechoic room
- anelasticity
- anemograph
- anemometer
- anemometer buoy