gforth - 0.7.3+dfsg-9 main

This is the GNU'ish implementation of a Forth programming environment.
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Forth, as a language, is best known for being stack-based, and completely
extensible. Each Forth environment provides one or more dictionaries of
pre-defined words, and programming in Forth consists of defining and
executing new words that are combinations of previously defined words. It
has been said that learning Forth changes forever the way you think about
writing programs.
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For more information about Forth, visit the Forth Interest Group web site
at http://www.forth.org/fig.html.