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| Subject | English | Thesaurus |
| IT, abbr. | Authorized Academic Training Program | AATP (MS, MCSD) |
| abbr., file.ext. | Authorized Academic Training Program | AATP (Microsoft) |
| IT, abbr. | Authorized Program Analysis Report | APAR (IBM) |
| mil., abbr. | Authorized Program Facility | APF |
| IT, abbr. | Macromedia Authorized Training Program | ATP (Macromedia) |
| mil., abbr. | Authorized Vendor Program | AVP |
| busin., abbr. | Book Of Authorized Services | BAS |