Publisher: Wikibooks 2010
Tcl (Tool Command Language) is a dynamic programming/scripting language based on concepts of Lisp, C, and Unix shells. It can be used interactively, or by running scripts (programs) which can use a package system for structuring, hence allowing to do much with little code. This book also discusses the GUI toolkit Tk in considerable extent.
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by Salvatore Sanfilippo - invece.org
This book is an introduction to the main ideas of the Tcl programming language: If you wish to learn a simple and powerful programming language, this book is for you. The only prior knowledge needed is some basic understanding of programming.
by Clif Flynt, et al. - Tcl Developer Xchange
The tutorial is aimed at those who have some knowledge of programming, although you certainly don't have to be an expert. It is intended as a companion to the Tcl manual pages which provide a reference for all Tcl commands.
by John K. Ousterhout - Addison-Wesley
The text takes a no-nonsense approach to the language, describing the elements of Tcl and Tk in programming-reference-style detail. If you are already familiar with a C-like language and want an introduction to Tcl and Tk, this is the book for you.
by Hal Abelson, Philip Greenspun, Lydia Sandon
We hope that a professional programmer or MIT student can breeze through this book in one evening. By the end of the evening, that person should have learned Tcl, learned a little something about the Web, and not have been bored.