| MAPI | Messaging Application Programming Interface | 消息应用程序编程接口 |
| MAPI | Missouri Association of Private Investigators | 密苏里州私人调查员协会 |
| MAPI | Millon Adolescent Personality Inventory | Millon青少年人格问卷 |
| MAPI | Manufacturers Alliance for Productivity and Innovation (Arlington, Virginia) | 制造商生产力和创新联盟（弗吉尼亚州阿灵顿） |
| MAPI | microbial alkaline protease inhibitor | 微生物碱性蛋白酶抑制剂 |
| MAPI | Morale Action Point Initiative | 道德行动点倡议 |