| AC - Alternating Current |
| ACR - Attenuation-to-Crosstalk Ratio |
| A-D or A/D - Analog to Digital conversion |
| ADA - Americans with Disabilities Act |
| ADO - Auxiliary Disconnect Outlet |
| ADSL - Asymmetrical Digital Subscriber Line |
| AIA - American Institute of Architects |
| AM - Amplitude Modulation |
| ANSI - American National Standards Institute |
| ASCII - American Standard Code for Information Interchange |
| ATM - Automatic Teller Machine |
| ATM - Asynchronous Transfer Mode |
| AWG - American Wire Gauge |
|
|
|
