| Acronym | Definition |
|---|
| INS | Inertial Navigation System |
| INS | Insurance |
| INS | Insert |
| INS | Instruction |
| INS | Inspection |
| INS | I'm Not Sure |
| INS | Insulin |
| INS | Insensitive |
| INS | Input String |
| INS | Institutul National de Statistica (Romania) |
| INS | Immigration & Naturalization Service (reorganized in 2003 under DHS, functions divided among USCIS, ICE and CBP) |
| INS | International Network Services (company) |
| INS | Instituto Nacional de Seguros (Costa Rica's insurance institution) |
| INS | Institut National de la Statistique (French) |
| INS | International News Service |
| INS | Insert Code |
| INS | International Neuropsychological Society |
| INS | Integrated Network Solutions |
| INS | I'm Not Stupid |
| INS | Star Trek: Insurrection (Star Trek movie) |
| INS | Infusion Nurses Society |
| INS | In Nomine Satanis (roleplaying game) |
| INS | Information Network System |
| INS | Itchy and Scratchy (The Simpsons) |
| INS | International Numbering System |
| INS | independent news service |
| INS | Indian Naval Ship |
| INS | Intravenous Nurses Society |
| INS | Iowa Network Services, Inc. |
| INS | Indian Newspaper Society (New Delhi, India) |
| INS | Iron Soldering |
| INS | Integrated Netfinity Server |
| INS | Internal Navigation System (US Navy DoD) |
| INS | Interstate Nuclear Services |
| INS | Intranasal Steroids |
| INS | Intelligent Notification Services (IBM) |
| INS | Integrated Network System |
| INS | Institute of Nuclear Studies (Japan) |
| INS | Informatics Nurse Specialist (American Nurses Association) |
| INS | Internet Configuration Settings (file name extension) |
| INS | Indirect Sourcing (Nokia) |
| INS | Intelligent Network Systems |
| INS | Independent NECA (National Exchange Carrier Association) Services, Inc. |
| INS | Inelastic Neutron Scattering/Spectrometer |
| INS | Institute of Naval Studies |
| INS | Integrated Nitrogen System |
| INS | Institute of National Strategy |
| INS | IMF Institute Department (International Monetary Fund) |
| INS | Information Nurse Specialist |
| INS | Improved NADGE Station |
| INS | Indigenous Names Survey (Canada) |
| INS | International Network Solutions, Inc. |
| INS | Initial Navy Stock |
| INS | Integrated Navigation Set |