| English | Thesaurus |
| Application Program Interface | API (API) |
| Biometric Application Program Interface | BAPI (API, MS) |
| Common Speller Application Program Interface | CSAPI (API) |
| Communication Application Program Interface | CAPI (ISDN, API) |
| Dial Services Interface | DSI (API, API, IBM) |
| SNMP Distributed Program Interface | DPI (SNMP, RFC 1228) |
| eXtended Messaging Application Program Interface | XMAPI (API) |
| Human Authentication Application Program Interface | HAAPI (API) |
| Human Authentication Application Program Interface | HA-API (API) |
| Licensed Services Application Program Interface | LSAPI (MS, API) |
| Lightweight Directory Access Protocol Application Program Interface | LDAPAPI (LDAP, RFC 1823, API) |
| Lightweight Directory Access Protocol Application Program Interface | LDAP API (LDAP, RFC 1823, API) |
| Messaging Application Program Interface | MAPI (MS, WOSA, API) |
| Network Communications Services Interface | NCSI (Network Products Corp.) |
| Queue Application Program Interface | QAPI (SAP, API) |
| Telephony Application Program Interface | TAPI (Intel, MS, WOSA, CTI) |
| Telephony Services Application Program Interface | TSAPI (AT&T - Novell) |
| Virtual Control Program Interface | VCPI (DOS, Intel) |
| Voyetra Applications Program Interface | VAPI (API) |
