| Abbreviation | Definition |
|---|---|
| AOI | All Other Income |
| AOP | Annual Operational Plan |
| AOSD | Accounting Operations Systems Division |
| AOSG | Accountancy Occupational Standards Group |
| AOSSG | Asian-Oceanian Standard-Setters Group |
| AOT | Adjustment Of Terms |
| AOV | Average Order Value |
| AOY | Any One Year |
| AP | Accounting Package |
| AP | Accounts Payable |
| AP | Advance Payment |
| AP | As Purchased |
| APA | Advance Pricing Agreement |
| APA | American Psychological Association |
| APA | Association of Practising Accountants |
| APAK | Abschlussprüferaufsichtskommission |
| APATS | Assistant Production Accounting Training Scheme |
| APB | Accounting Principles Board |
| APBI | Accounting Principles Board Interpretations |
| APBO | Accounting Principles Board Opinions |