A former Tcl programmer, Frank [http://www-lce.eng.cam.ac.uk/~fms27/]
now works mostly in Python.  He explains why in the paper [http://www-lce.eng.cam.ac.uk/~fms27/papers/tr-1998-9.pdf] immortalized
for its "[Batteries included]" meme.

See http://www.cl.cam.ac.uk/~fms27/papers/tr-1998-9.pdf for a pdf of the paper...
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