Tool Command Language

interpreted programming language used to develop prototype applications and CGI scripts, TCL (Computers)

TCL may mean:Tcl (Tool Command Language), a computer programming languageTerminal Control Language, used to program VeriFone devicesTerminal Control Language, a Pick operating system command languageTrader Constraint Language, part of the CORBA Notification ServiceTwin City Lines, former public transit via streetcar in MinneapolisTCL Corporation, a Chinese electronics manufacturerTowarzystwo Czytelni Ludowych (1880–1939) or  People's Libraries SocietyTexas Collegiate League, a collegiate baseball leagueThe Common Link, a KOMpatible Bulletin board system for MS-DOSTransports en commun lyonnais, the Lyon public transport system.Transaction Control Language, a family of computer languages used by database systems to control transactions.
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Tcl (originally from "Tool Command Language", but nonetheless conventionally rendered as "Tcl" rather than "TCL"; and pronounced as "" or "teekle") is a scripting language created by John Ousterhout. Originally "born out of frustration"—according to the author—with programmers devising their own (poor quality) languages intended to be embedded into applications, Tcl quickly gained wide acceptance on its own and is generally thought to be easy to learn, but powerful in competent hands. It is most commonly used for rapid prototyping, scripted applications, GUIs and testing. Tcl is used extensively on embedded systems platforms, both in its full form and in several other small-footprinted versions. Tcl is also used for CGI scripting and as the scripting language for eggdrop bots.
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<language> /tik*l/ (Tcl) An interpreted string processing language for issuing commands to interactive programs, developed by John Ousterhout at UCB. Each application program can extend tcl with its own set of commands.
Tcl is like a text-oriented Lisp, but lets you write algebraic expressions for simplicity and to avoid scaring people away. Though originally designed to be a "scripting language" rather than for serious programming, Tcl has been used successfully for programs with hundreds of thousands of lines.
It has a peculiar but simple syntax. It may be used as an embedded interpreter in application programs. It has exceptions and packages (called libraries), name-spaces for procedures and variables, and provide/require. It supports dynamic loading of object code. It is eight-bit clean. It has only three variable types: strings, lists and associative arrays but no structures.
Tcl and its associated GUI toolkit, Tk run on all flavors of Unix, Microsoft Windows, Macintosh and VMS. Tcl runs on the Amiga and many other platforms.
Current version: 8.0.3, as of 1998-09-25.
See also expect (control interactive programs and pattern match on their output), Cygnus Tcl Tools, [incr Tcl] (adds classes and inheritence to Tcl), Scriptics (John Ousterhout's company that is the home of Tcl development and the TclPro tool suite), Tcl Consortium (a non-profit agency dedicated to promoting Tcl), tclhttpd (an embeddable Tcl-based web server), tclx (adds many commands to Tcl), tcl-debug.
comp.lang.tcl FAQ at MIT. or at purl.org.
Scriptics downloads. Kanji.
Usenet newsgroups: news:comp.lang.tcl.announce, news:comp.lang.tcl.
["Tcl: An Embeddable Command Language", J. Ousterhout, Proc 1990 Winter USENIX Conf].
(1998-11-27)