IDL
# IDL

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

* 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
