| Acronym | Definition |
|---|
| IS➣Information System(s) |
| IS➣In Service |
| IS➣Internet Service |
| IS➣Information Services |
| IS➣International System (of units) |
| IS➣International Standard |
| IS➣Industry Standard |
| IS➣Image Size (semiconductor manufacturing) |
| IS➣Information Security |
| IS➣International Staff (NATO) |
| IS➣Island |
| IS➣Internet Solutions (South Africa) |
| IS➣Image Studio |
| IS➣Internet Society |
| IS➣Indian Standards |
| IS➣Israel (Including Israel-Jordan & Israel-Syria Demilitarized Zones) |
| IS➣Industrial Safety |
| IS➣Industrial Society |
| IS➣Industrial Security |
| IS➣Instruction Set |
| IS➣Information Structure (linguistics) |
| IS➣Income Support (UK) |
| IS➣Internal Security |
| IS➣Internal Stop |
| IS➣Internal Standard |
| IS➣Installation Survey |
| IS➣Initial Study |
| IS➣Industry Sector |
| IS➣Integrated System |
| IS➣Integrated Science |
| IS➣Irish Standard (fire alarms) |
| IS➣Integrated Schedule |
| IS➣Industrial Specialist |
| IS➣Intelligent Services Gateway |
| IS➣Intelligence Specialist (Navy Rating) |
| IS➣Intelligent Systems (IEEE International Conference) |
| IS➣Intelligent Sport (Lexus model) |
| IS➣Infrastructure Service |
| IS➣International Supplement (ODT) |
| IS➣Iceland |
| IS➣Indianapolis Star (newspaper) |
| IS➣Intermediate School |
| IS➣Intermediate System |
| IS➣Iron Soldier (Atari Jaguar game) |
| IS➣Insertion Sequence (molecular biology) |
| IS➣Interface Specification |
| IS➣Internal Specification |
| IS➣Intelligent Sensor |
| IS➣Investigations Service (OPM) |
| IS➣Inner Sphere (Mech Warrior) |
| IS➣Interstate System |
| IS➣Importance Sampling |
| IS➣Interim Standard (series of communication standards) |
| IS➣Interim Status |
| IS➣Islamic State |
| IS➣Instrumentation System |
| IS➣Imagery Server |
| IS➣Integer Sort |
| IS➣Interrupt Status |
| IS➣Intelligence Squadron |
| IS➣Installshield |
| IS➣Initial Spares |
| IS➣Imperial Stout |
| IS➣Indexed Sequential |
| IS➣Information Superiority |
| IS➣Image Stabilization (camera feature) |
| IS➣Inspection Services |
| IS➣Image Shack (image hosting service) |
| IS➣Intrinsic Safety |
| IS➣International Standardization |
| IS➣Image Stabilizer (camera lens) |
| IS➣Information Separator |
| IS➣Induction Soldering |
| IS➣Isles of Scilly (UK) |
| IS➣Infinite Stratos (Japanese novel series) |
| IS➣Iasi (Romania) |
| IS➣International Socialists |
| IS➣Indentation Strength |
| IS➣Intrinsically Safe |
| IS➣Inbred Strain |
| IS➣Interscope Records (record label) |
| IS➣Isotope Separation |
| IS➣Ipecac Syrup |
| IS➣Ilta-Sanomat (Finnish newspaper) |
| IS➣Impôt sur les Sociétés (French: corporation tax) |
| IS➣Immunosuppression (treatment complication) |
| IS➣Iron Savior (band) |
| IS➣Ismailia (Egyptian automobile license plate) |
| IS➣Infrasound |
| IS➣Induced Sputum |
| IS➣Infraspinatus (muscle) |
| IS➣Isernia, Molise (Italian province) |
| IS➣Intercostal Space |
| IS➣Incentive Spirometer |
| IS➣Investigation Scientist (US NASA) |
| IS➣Inventory of Systems |
| IS➣Indicating Switch |
| IS➣Interferon Sensitivity |
| IS➣Isotopic Source |
| IS➣Instituti I Statistikes (Albanian: Statistics Institute) |
| IS➣Internal Silencer |
| IS➣Infinite Spawn (gaming) |
| IS➣Instituto Sertão (Brasil) |
| IS➣Imtiazi Sanad (Certificate of Distinction Pakistan Armed Forces) |
| IS➣Immaculata Symphony (Immaculata, PA) |
| IS➣Itakura-Saito distortion |
| IS➣Investments Equal Savings (macroeconomic curve) |
| IS➣Insurgent Sisterhood (Star Wars Galaxies guild) |
| IS➣Industry Solutions Module |
| IS➣Immersible Switch |
| IS➣Interactive Structures, Incorporated |
| IS➣(USN Rating) Intelligence Specialist |