| American Company Makes Everything | Academic & Science |
| Academy of Criminology, Mathematics, and Education | Academic & Science |
| Advisory Committee for Mathematics Education | Academic & Science |
| Advanced Cold Molecule Electric | Academic & Science |
| Accelerated Climate Modeling for Energy | Academic & Science |
| Advisory Committee on the Marine Environment | Academic & Science |
| Academic Credit for Military Experience | Academic & Science |
| Accelerated Climate Model for Energy | Academic & Science |
| Activities Committee For Metro Employees | Business |
| Annual Creative Marketing Extravaganza | Business |
| Association for Chinese Management Educators | Business |
| Automatic Certificate Management Environment | Business |
| Automated Certificate Management Environment | Business |
| Acme Communications | Business |
| Advanced Clock Management Engine | Business |
| Association of Consulting Management Engineers | Business Management |
| Athena Competition Mastery And Enrichment | Community |
| Action Conflict Mystery And Emotion | Community |
| American Contemporary Music Ensemble | Community |
| Art Community Museum Education | Community |
| Artists Composers Musicologists and Educators | Community |
| Atlanta Chapter Model Education | Community |
| Art Community Museum and Education | Community |
| Artisans Crafters Masters and Educators | Community |
| All Can Modify the Environment | Computing |
| Acme (computer virus), a computer virus which infects Microsoft DOS EXE files | Computing |
| As Cold as My Ears | Computing |
| All-round Capability Model of Excellence | Computing |
| Assembling Configuration Management Environment | Computing |
| Activity Monitor | Computing |
| Advanced Computer Matrix for Engineering | Computing |
| Advisory Committee On Mathematics Education | Country Specific |
| Alltime Crappiest Machine Ever | General |
| Amazing Canadian Mountain Expedition | General |
| A Company that Makes Everything | General |
| Anyone Can Make Enemies | General |
| Air Craft Marine Engineering | General |
| Accelerated Curriculum Model of Expectations | General |
| Accreditation Commission for Midwifery Education | General |
| Atlanta Car Model Enthusiasts | General |
| Assembling Configuration Management Environments | Governmental |
| Association of Consulting Municipal Engineers | Governmental |
| Advisory Council on Medical Education | Governmental |
| Automated Classification of Medical Entities | Information Technology |
| Anticipate Compensate Meta-cognition Error checking | Medical |
| Advisory Committee on Medical Establishment (Scotland) | Medical |
| Alliance for Continuing Medical Education | Medical |
| Angioplasty Compared to MEdicine | Medical |
| Arginine Catabolic Mobile Element | Medical |
