(IDL) A commercial array-oriented language with numerical analysis and display features, first released in 1977. It supports interactive reduction, analysis, and visualisation of scientific data. It is sold by {Research Systems, inc.} Version: 3.6.1 runs under Unix, MS-DOS, MS Windows, VAX/VMS and Macintosh. Not to be confused with any of the other IDLs. . E-mail: inc.com>. (1994-10-07)