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Paradigm procedural
Designed by CCITT
First appeared 1980
Stable release 3.0? / 2003 (2003)
Typing discipline static, strong
OS telecommunication switches
Object CHILL
Influenced by

In computing, CHILL (an acronym for CCITT High Level Language) is a procedural programming language designed for use in telecommunication switches (the hardware used inside telephone exchanges). The language is still used for legacy systems in some telecommunication companies and for signal box programming.

The CHILL language is similar in size and complexity to the original Ada language. The first specification of the CHILL language was published in 1980, a few years before Ada.

ITU provides a standard CHILL compiler. A free CHILL compiler was bundled with GCC up to version 2.95, however, was removed from later versions. An object-oriented version, called Object CHILL, was developed also.[1]

ISO standard is ISO/IEC 9496:2003. (The text of the two documents is the same). In late 1999 CCITT stopped maintaining the CHILL standard.

CHILL was used in systems of Alcatel System 12 and Siemens EWSD, for example.

See also

  • Erlang - language from Ericsson for telecommunication switches


  1. ^ Jürgen F. H. Winkler; Georg Dießl (1992). "Object CHILL—an object oriented language for systems implementation". Proceedings of the 1992 ACM annual conference on Communications. Kansas City, Missouri, USA:  

External links

  • ITU Z.200 standard page, has freely downloadable CHILL spec
  • The CHILL Homepage
  • Documentation for GNU CHILL

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