APAC
- A-PAC
- Adult Performer Advocacy Committee
- Air Products
- American Israel Public Affairs Committee
- Apac
- Apac District
- Asia Pacific Activities Conference
- Asia, Pacific and Africa Collections, British Library
- Asia-Pacific
- Asia-Pacific Amateur Championship
- Atlas Performing Arts Center
- Audio Publishers Association
- Australia Pacific Airports Corporation
- Australian Partnership for Advanced Computing
- Australian Performing Arts Collection
- Australian Psychology Accreditation Council