| Subject | English | Thesaurus |
| IT, abbr. | Abstract Windows Toolkit-Application Programmer Interface | AWTAPI (AWT, API, Java) |
| el., abbr. | Actuator Sensor Interface | ASI |
| softw., abbr. | Advanced Scsi Programmer's Interface | ASPI |
| IT, abbr. | Audio Message Interface Standard | AMIS |
| IT, abbr. | Business Application Programmer's Interface | BAPI (SAP, R/3, API) |
| IT, abbr. | Cryptography Application Programming Interface | CAPI (Verschluesselung, API) |
| comp., MS | Cryptography Application Programming Interface | CryptoAPI (An (API) that is provided as part of Microsoft Windows. CryptoAPI provides a set of functions that allow applications to encrypt or digitally sign data in a flexible manner while providing protection for the user's sensitive private key data. Actual cryptographic operations are performed by independent modules known as (CSPs)) |
| mil., abbr. | ECMC Interface Facility | EIF |
| abbr., mil. | Electrical Interface Control Drawing | EICD (WiseSnake) |
| mil., abbr. | Enhanced Interface Facility | EIF |
| abbr., telecom. | Facility Interface Code | FIC (t_edelweis) |
| IT, abbr. | Facility Interface Processor | FIP |
| IT, abbr. | Family Application Programmer Interface | FAPI (DOS, VDM, API) |
| abbr., scottish | Hook Interface Kit for transport of ISO containers | HIK |
| mil., abbr. | Host Automated Message Interface | H-AMI |
| IT, abbr. | Host Transport Service Interface | HTSI (ICC, CT-API) |
| mil., abbr. | Host-Message Interface | HMI |
| abbr., file.ext. | Information/Interface Message Processor | IMP |
| abbr., mil., commer. | Interface Control Drawing or Document | ICD |
| abbr. | Interface Message Processor | IMP (ARPANET/MILNET) |
| IT, abbr. | Interface Message Processor | IMP (ARPANET/MILNET, replaced by PSN) |
| el., abbr. | Interface Message Processor | IMP |
| telecom., abbr. | Interface Message Processor | IMP (ARPANET) |
| IT, abbr. | Interface Message Processors | IMP (ARPANET, MILNET) |
| telecom., abbr. | Interface Message Processors | IMP |
| abbr., astronaut., mil. | Interface Message Protocol | IMP |
| IT, abbr. | Internet Server Application Programmer's Interface | ISAPI (MS, C/S, WWW, API) |
| account., abbr. | Japanese English Dictionary Interface | JEDI |
| telecom., abbr. | Message Application Programming Interface | MAPI |
| IT, abbr. | Message Passing Interface | MPI (SMP, Cluster) |
| abbr., IT | Message Passing Interface | MPI (Annaa) |
| ocean., abbr. | Message Passing Interface Forum | MPIF |
| IT, abbr. | Message Passing Interface Forum | MPIF (Hersteller) |
| abbr., comp., net. | Message Queue Interface | MQI |
| telecom., abbr. | Message Queueing Interface | MQI (IBM) |
| progr. | message-passing interface | MPI (ssn) |
| IT, abbr. | Netscape Server Application Programmer's Interface | NSAPI (Netscape, WWW, C/S, API) |
| abbr., IT | Network Termination Interface | NTI |
| abbr., file.ext. | Programmer's Interface | PI |
| IT, abbr. | Short Message Service Center External Machine Interface | SMSCEMI (protocol, SMS) |
| IT, abbr. | Telephony Server Application Programmer Interface | TSAPI (AT&T, Novell, API) |
| abbr., astronaut., mil. | Terminal Interface message Processor | TIP |
| abbr., file.ext. | Text-Based User Interface | TUI (WordPerfect) |
| IT, abbr. | Text-Based User Interface | TUI (UI) |
| comp., abbr. | Text-based User Interface | TUI |
| abbr., file.ext. | Transport Device Interface | TDI |
| abbr., IT | Transport Driver Interface | TDI |
| abbr., comp., net. | Transport Layer Interface | TLI |
| IT, abbr. | Transport Level Interface | TLI (AT&T) |
| abbr., comp., net. | Transport Level Interface | TLI |
| mil., abbr. | Transportable Ground Interface Facility | TGIF |
| abbr., file.ext. | Universal Text Interchange/Interface | UTI |
| IT, abbr. | Web Interface Facility | WIF (WWW, MVS, OS/390) |
| softw., abbr. | Windows Message Passing Interface | WMPI |
| IT, abbr. | X/open Transport Interface | XTI (X/Open, X-Windows) |
| abbr., comp., net. | X/Open Transport Interface | XTI |