| Abbreviation | Definition |
|---|---|
| AISC | American Institute of Steel Construction |
| AISI | American Iron & Steel Institute |
| AITC | American Institute of Timber Construction |
| AKBC | Automated Knowledge Base Construction |
| AL | Aluminium |
| ALA | American Lung Association |
| ALER | Airfield Lighting Equipment Room |
| ALO | Architectural Liaison Officer |
| ALUM | Aluminium |
| AMBER | Atlas Muon Barrel And Endcap Reconstruction |
| AMCA | Air Movement and Control Association International, Inc. |
| AMCU | Association of Mineworkers and Construction Union |
| AMCU | Association of Mineworkers Construction Union |
| AMCU | Association of Mining and Construction Union |
| AMRE | American Model Railroad Enthusiast |
| ANCR | Australian National Construction Review |
| ANSI | American National Standards Institute |
| AP | Asphalt Pavement |
| APAC | Ashland Paving And Construction |
| APEO | alkylphenol ethoxylates |