| Abbreviation | Definition |
|---|---|
| APSI | Advocacy and Protective Services Inc |
| APSI | Advocacy and Protective Services, Inc. |
| APSI | Aker Philadelphia Shipyard |
| APSI | Alliance Power Solutions Inc |
| APSI | American Plumbing Supply International |
| APSI | Amicassa Process Solutions Inc |
| APSI | Aqua Power Systems Inc |
| APSI | Austin Plastic Surgery Institute Inc. |
| APSI | Auto Parts Specialist Inc |
| APSL | Adtech Peripheral Support, Ltd. |
| APSL | Advanced Programming Solutions S.L |
| APSM | Alternative Precision Sheetmetal Ltd |
| APSPDC | Andhra Pradesh Southern Power Distribution Company |
| APSPDCL | Andhra Pradesh Southern Power Distribution Company Limited |
| APSPDCL | Southern Power Distribution Company of Andhra Pradesh Limited |
| APSSDC | Andhra Pradesh State Skill Development Corporation |
| APS-UPD | Advanced Photon Source - User Program Division |
| APS-XFD | Advanced Photon Source - Experimental Facilities Division |
| APT | Alpha Pro Technology, LTD. |
| APT | American Pneumatic Tools |