Forth is a computer programming language based on Reverse Polish Notation ([RPN]), e.g. in arithmetics like HP calculators:
 1 2 + 3 * 4 /  ( comments start with open paren and extend to close paren)
compares to Tcl's
 [expr {(1+2)*3)/4}] ;# comments
or, using [Math Operators as Commands],
 [/ [* [+ 1 2] 3] 4]

http://www.forth.org/

FORTH in tcl anyone?
   * [A different FORTH] -- [JBR]
   * [Trying FORTH in Tcl] -- [jcw]
   * [RPN in Tcl], [RPN again] -- [RS]
   * [HP Calculator Simulations]
   * [GPS RPN] -- (Forth-like) [GPS]
   
Chuck Moore created FORTH in 1970.  An interesting article about FORTH appeared in Byte magazine [http://www.colorforth.com/byte.htm] .

Related to this is [1% the code] a shocking paper by Chuck Moore.

Tutorials

   * Brief Introduction [http://www.ece.cmu.edu/~koopman/forth/hopl.html]
   * And so Forth (a primer)[http://www.xs4all.nl/~thebeez/ForthPrimer/Forth_primer.html]
   * Comprehensive (for 4tH)[http://www.geocities.com/SiliconValley/Bay/2334/4thtutor.htm]

Leo Brodie's "Starting Forth" as a starkit for Windows/Linux/Solaris can be found here [http://www.equi4.com/pub/sk/brodie_sf.kit], based on the web version of the book at [http://home.iae.nl/users/mhx/sf.html].

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Often over the years, FORTH and Tcl have been compared because of the
mindset in both to write lots of procs/words to do one's work. 

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Several Forths have bound to [Tk] for their [GUI] toolkit needs.
V6 [http://www.amresearch.com/v6/] is a commercial Forth 
based on Gforth available
for [Linux]es (and *[BSD]?  and [MacOS X]?).

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[Zarutian] 24. september 2006: Does an Tcl interpreter in Forth exists?

[Zarutian] 27. september 2006: Or do I have to write one? 

[wdb] Please yes!

[Zarutian] 20. june 2007: Hmm... that would require Forth words for:
   * string manipulation (slicing and splicing)
   * string comparision
and something more probably.

[tb] 17. july 2007 - @wdb: Do you think of a string stack? How much of a FORTH system would be appropriate for emulation? A true 2stack machine with a "Dictionary space", an "Inner interpreter", an "Outer interpreter", compilers and defining words, complete with it's own command loop?


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