- Academic Newtown Community Cable Service
- ACC Area Sports Journal
- ACCS Network
- ACCS Salon Management Systems
- Adams Central Community Schools
- Advanced CAD/CAM Service Corporation
- Advanced Computer and Communication Systems Internet Services
- Advanced Contact Centre Solutions
- Air Conditioning Cleaning Service
- Airline Cargo Council of Switzerland
- American Car Club Sweden
- The American Center for Chinese Studies
- American Corrective Counseling Services
- American Credit Counseling Service, Inc.
- Amsterdam Centre for Computational Science
- Ancient Coin Certification Service
- ARC Center for Complex Systems
- Ark Community Charter School
- Arlington County Commuter Services
- Association Catholique Canadienne de la Sant�
- Association for Chinese Communication Studies
- Association of Classical and Christian Schools
- The Association of Collegiate Computing Services of Virginia
- Australian College of Cosmetic Surgery
- Australian Contamination Control Society
- Australian Crowd Control Services
- Automated Content Control System
- A+ Certified Computer Service
