| Meaning | Category |
| A Cut Above | Business->General |
| Acapulco, Mexico | Regional->Airport Codes |
| Accreditation Council for Accountancy | Business->Accounting |
| Actual Cost Adjustment | Business->Accounting |
| Adaptive Conjoint Analysis | Academic & Science->Mathematics |
| Address Control Application | Computing->Networking |
| Adult Children Anonymous | Community->Non-Profit Organizations |
| Adult Children of Alcoholics | Community->Non-Profit Organizations |
| Advance Cargo Advice | Governmental->Transportation |
| Advanced Cargo Aircraft | Governmental->Military |
| Adventure Cycling Association | Community->Sports |
| After Contract Award | Governmental->Military |
| Agency for Cultural Affairs | Governmental |
| Agricultural Crop Additive | Miscellaneous->Food |
| Air Combat Command | Governmental->Military |
| Airborne Collection Assembly | Governmental->Military |
| Airlift Clearance Authorities | Governmental->Military |
| Airspace Control Authority | Governmental->Military |
| Airspace Coordination Area | Governmental->Military |
| Alabama Power Company | Business->NYSE Symbols |
| Alley Cat Allies | Community->Non-Profit Organizations |
| Almost a Chartered Accountant | Miscellaneous->Funnies |
| Always Cancelled Airplanes | Miscellaneous->Funnies |
| America, Canada, and Australia | Regional->Countries |
| American Camp Association | Community->Non-Profit Organizations |
| American Canine Association | Miscellaneous->Dogs Related |
| American Canoe Association | Community->Sports |
| American Chichlid Association | Academic & Science->Botany |
| American Chiropractic Association | Business->Professional Organizations |
| Amputee Coalition of America | Community->Non-Profit Organizations |
| Andres Castro Arms | Governmental->Military |
| Anhydrous Codeine Alkaloid | Medical->Laboratory |
| Animal Charities of America | Community->Non-Profit Organizations |
| Animated Cel Archive | Community->Media |
| Anisotropically Conductive Adhesive | Academic & Science->Electronics |
| Another Confusing Acronym | Miscellaneous->Funnies |
| Anti Copyright Association | Business->Firms |
| Apples of California Agriculture | Business->Firms |
| Arithmetic Comprehension Axiom | Academic & Science->Mathematics |
| Arithmetical Comprehension Axiom | Computing->Software |
| Arkansas Code Annotated | Community->Law |
| Army Control Authority | Governmental->Military |
| Arrowpoint Content Awareness | Computing->General |
| Asean Cosmetic Association | Business->Firms |
| Asia Children's Assistance, LTD. | Community->Non-Profit Organizations |
| Asociación Casa Alianza | International->Guatemalan |
| Asociación Cristiana 'AGAPAO' | International->Guatemalan |
| Assembly Constitutional Amendment | Governmental->Politics |
| Associate Chartered Accountant | Business->Positions |
| Association of Canadian Advertisers | Community->Media |
| Association of Canadian Archivists | Community->Museums |
| Association of Chinese Americans | Community->Non-Profit Organizations |
| Atacama Compact Array | Academic & Science->Astronomy |
| Austin Cycling Association | Community->Sports |
| Australian Clan Alliance | Community |
| Australian Cloggers Association | Miscellaneous->Hobbies |
| Automatic Channel Assignment | Governmental->Military |
| Automatic Circuit Assurance | Computing->Telecom |
| Automatic Conference Arranger | Governmental->Military |
| Automotive Club Alliance | Governmental->Transportation |
| Avanade Connected Architectures | Computing->General |
| Project Manager Workbench Project file | Computing->File Extensions |
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