IDL
Look up IDL in Wiktionary, the free dictionary.
IDL may refer to:
Computing
- Interface description language, any computer language used to describe a software component's interface
- IDL specification language, the original IDL created by Lamb, Wulf and Nestor at Queen's University, Canada
 - OMG IDL, an IDL standardized by Object Management Group selected by the W3C for exposing the DOM of XML, HTML, CSS, and SVG documents
 - Microsoft Interface Definition Language, an extension of OMG IDL for supporting Microsoft's DCOM services
 - Web IDL, a variation of an IDL for describing APIs that are intended to be implemented in Web browsers
 
 - Interactive Data Language, a data analysis language popular for science applications
 - ICAD Design Language, a knowledge-based engineering language used with the software ICAD
 
Places
- John F. Kennedy International Airport, formerly named Idlewild Airport with IATA airport code IDL
 - Indianola Municipal Airport, by FAA airport code
 - Inner Dispersal Loop, the common name of Interstate 444, a highway in downtown Tulsa, Oklahoma
 
Other uses
- Islamic Democratic League, a party
 - International Date Line, the time zone date boundary
 - Intermediate-density lipoprotein
 - International Drivers License
 - International Darts League, a defunct major darts tournament
 - IDL Drug Stores, a now-defunct independent drug store cooperative
 - Internet Defense League, a website