| Acronym | Definition |
|---|
| IMSI➣International Mobile Subscriber Identity |
| IMSI➣International Mobile Station Equipment Identity |
| IMSI➣International Mobile System Identifier |
| IMSI➣International Mobile Station Identity (now International Mobile Subscriber Identity) |
| IMSI➣International Microcomputer Software, Inc. |
| IMSI➣International Mathematical Sciences Institutes |
| IMSI➣International Maple Syrup Institute (Ferrisburgh, VT, USA) |
| IMSI➣Idaho Maximum Security Institution |
| IMSI➣Incident Management Systems Integration Division (US DHS and FEMA) |
| IMSI➣Intelligent Multi-Sensor Integration |
| IMSI➣Information Management Systems, Inc. |
| IMSI➣Integrated use of new Microwave Satellite data for Improved ice mapping |