| Abbreviation | Definition |
|---|---|
| AFCU | Arkansas Federal Credit Union |
| AFGE | American Federation of Government Employees |
| AFIO | Association of Former Intelligence Officers |
| AFL | Alberta Federation of Labour |
| AFL | American Federation of Labor |
| AFL-CIO | American Federation of Labor and Congress of Industrial Organizations |
| AFL-CIO | American Federation of Labor, CongressIndustrial Organizations |
| AFSCME | American Federation of State County and Municipal Employees |
| AGBU | Armenian General Benevolent Union |
| AGCU | Assemblies of God Credit Union |
| AGE | Associated Government Employees |
| AGSEM | Association of Graduate Students Employed at McGill |
| AGU | Asian Gymnastics Union |
| AHU | Arizona Hockey Union |
| AICB | All India Confederation Of The Blind |
| AICB | Associate, Institute of Canadian Bankers |
| AIDU | Amiri International Development Union |
| AIEU | Australian Insurance Employees Union |
| AIPU | Arab Inter parliamentary Union |
| AISU | American Indian Student Union |