| Acronym | Definition |
|---|
| ILS | Instrument Landing System |
| ILS | Integrated Library System (National Library of Medicine, NLM) |
| ILS | International Launch Services |
| ILS | Insurance Linked Securities (derivative securities linked to insurance contracts) |
| ILS | Independent Living Services |
| ILS | Independent Living Skills |
| ILS | Integrated Logistic Support (US DoD) |
| ILS | International Law Society (various schools) |
| ILS | I Love School |
| ILS | International Life Saving Federation (drowning prevention) |
| ILS | Incomplete Lineage Sorting (genetics) |
| ILS | Israel New Shekel (currency code) |
| ILS | Intelligent Light System |
| ILS | Internet Locator Server |
| ILS | Intelligent Layered Security |
| ILS | Internet Location Services |
| ILS | Information Locator Service |
| ILS | Ibm Learning Services |
| ILS | Integrated Logistic Support |
| ILS | Integrated Library System |
| ILS | Industrial Laser Solutions (various locations) |
| ILS | International Labour Standards |
| ILS | Institute for Laser Science (University of Electro Communications; Tokyo, Japan) |
| ILS | Italian Linux Society |
| ILS | Internet Locator Server (Microsoft) |
| ILS | Integrated Listening System |
| ILS | Intracavity Laser Spectroscopy |
| ILS | Inventory Locator Service |
| ILS | Interlaminar Shear Strength (composit materials) |
| ILS | Instrumentenlandesystem (German: Instrument Landing System; aviation) |
| ILS | Integrated Learning System |
| ILS | Intermediate Life Support (EMS) |
| ILS | In-Line Skates |
| ILS | Integrated Learning Solution (software) |
| ILS | Inscriptiones Latinae Selectae (selected Latin inscriptions) |
| ILS | Isolated Lissencephaly Sequence |
| ILS | Information & Library Science |
| ILS | Intelligent Library System (Lockheed) |
| ILS | Individual Line Service (telephones) |
| ILS | In loving service |
| ILS | Internet Love Scams |
| ILS | International Language Support |
| ILS | International Latitude Service |
| ILS | Islamic Legal Studies Conference |
| ILS | Instrument Line Shape |
| ILS | Immersive Learning Simulation |
| ILS | Industrial Law Society |
| ILS | In-Line Sled (oil and gas production) |
| ILS | Investigator Location Services, Inc. (clinical research; Irvine, CA) |
| ILS | Identification List |
| ILS | Increase in Lifespan (medical research) |
| ILS | Imaginary Lat Syndrome |
| ILS | Immigration Lawyer Search (American Immigration Lawyers Association) |
| ILS | International Logistic Standard (food law) |
| ILS | Idle Line State (Cisco) |
| ILS | International Lodging Service (Netherlands) |
| ILS | International Logistic Solutions (Tucson, Arizona) |
| ILS | International Logistics Systems, Inc (Glen Rock, PA) |
| ILS | Intermediate Level School (USMC) |
| ILS | Integrated Landing System |
| ILS | Increase of Life Span (medicinal effect) |
| ILS | Integrated Long-term Strategy |
| ILS | It Looks Silly (copyeditor comment) |
| ILS | Interoperable Language Standard |
| ILS | Individual Learning System |
| ILS | Integrated Local Services |
| ILS | International Laser Spectroscopy |
| ILS | InterActive Legal Suite (legal market software) |
| ILS | Integrated Logic Simulator |
| ILS | Information Systems, Logistics & Supply Chain (international conference) |
| ILS | Invoice Lag Summary (Sprint) |
| ILS | International Leasing System |
| ILS | Institute for Learning Science |
| ILS | Internet List Server |
| ILS | Intermediate Lateral Support (engineering) |
| ILS | New International Large Scale (Denmark) |
| ILS | Instant Listening Service (MP3.com) |