| Abbreviation | Definition |
|---|---|
| INR | Imager Navigation and Registration |
| INREP | IN-port REPlenishment |
| INREP | INstallation REPort |
| INREPL | INcoming REPLacement |
| INREQ | INformation REQuest |
| INRMP | Integrated Natural Resource Management Plan |
| INRP | Initial National Response Plan |
| INS | Improved Night Sight |
| INS | Indian Naval Ship |
| INS | Insert Code |
| INSARAG | INternational Search And Rescue Advisory Group |
| INSAS | Indian National Small Arm System |
| INSBC | Intelligence Security Board |
| INSCC | Intelligence and Security Command |
| INSCOM | Intelligence and Security Command |
| INSCOM | United States Army Intelligence and Security Command |
| INSET | Integrated National Security Enforcement Team |
| INSICOM | Integrated Special Intelligence Communications |
| INSNO | Installation Number |
| INSP | Inspection |