| ISL | Icehockey Super League 
| Others |
| isl | Icelandic
| Others |
| ISL | IDV Scripting Language
| Others |
| ISL | Illinois Simulator Laboratory
| Others |
| ISL | In Sim Life
| Others |
| ISL | In Situ Leach
| Others |
| ISL | In situ leaching
| Others |
| ISL | In-Situ Leaching
| Others |
| ISL | Independent School League
| Others |
| ISL | Indian Super
| Others |
| ISL | Indian Super League
| Others |
| ISL | Indiana Soccer League
| Others |
| ISL | Indiana State Library
| Others |
| ISL | Indigo Shader Language
| Others |
| ISL | Individual Stop-loss Limit
| Others |
| ISL | Industry Solutions Labs
| Others |
| ISL | Inertial Systems Laboratory
| Others |
| ISL | Information Systems Laboratories
| Others |
| ISL | Information Systems Laboratory
| Others |
| ISL | Initial Secondary Loader
| Others |
| ISL | Initial System Load
| Others |
| ISL | Initial System Loader
| Others |
| ISL | Inner Self Lost
| Others |
| ISL | Innovation Service Loyalty
| Others |
| ISL | Input Seal
| Others |
| ISL | Institute of Salt Lakes
| Others |
| ISL | Institute of Shipping Economics and Logistics
| Others |
| ISL | Institute of State and Law
| Others |
| isl | Integer set library
| Others |
| ISL | Intelligent Single Lacer
| Others |
| ISL | Intelligent Speed Limiter
| Others |
| ISL | Intelligent Systems Laboratory
| Others |
| ISL | Inter Satellite Link
| Others |
| ISL | Inter Subnetwork Link
| Others |
| ISL | Inter Switch Link
| Others |
| ISL | Inter-Switch Link
| Others |
| ISL | Intercon Security Limited
| Others |
| ISL | Intermediate Silicon Layer
| Others |
| ISL | Intermediate Stoppage List
| Others |
| ISL | Internal Systems Limited
| Others |
| ISL | International School of Lausanne
| Others |
| ISL | International School of Louisiana
| Others |
| ISL | International School of Lusaka
| Others |
| ISL | International School of Luxembourg
| Others |
| ISL | International Service Learning
| Others |
| ISL | International Sign Language
| Others |
| ISL | International Society of Lymphology
| Others |
| ISL | International Sparring League
| Others |
| ISL | International Standard for Laboratories
| Others |
| ISL | International Student Life
| Others |
| ISL | International Swimming League
| Others |
| ISL | International Symposium on Logistics
| Others |
| ISL | Internet Services Layer
| Others |
| ISL | Interpolated Standard Level
| Others |
| ISL | InterScapular Line
| Others |
| ISL | Introduction to Statistical Learning
| Others |
| ISL | Inuit Sign Language
| Others |
| ISL | Inverse Square Law
| Others |
| ISL | Investigating Student Learning
| Others |
| ISL | Iowa Soccer League
| Others |
| ISL | Irvine Swim League
| Others |
| ISL | Isabel Pass Airport, Isabel Pass, Alaska USA
| Others |
| ISL | Islamic
| Others |
| ISL | Islamic State in Lanao
| Others |
| ISL | Island Line
| Others |
| ISL | Island Soccer League
| Others |
| ISL | Isle
| Others |
| ISL | Isleworth Railway Station
| Others |
| ISL | Isleyen
| Others |
| ISL | Itchen Stationers Ltd
| Others |
| ISL | itial Secondary Loader
| Others |
| ISL | itial System Load
| Others |