111: Calc -- poor man's Mathematica within Emacs
  
  Author: Dave Gillespie <daveg@csvax.cs.caltech.edu>
  Latest released version: 2.02
  Anonymous FTP:
    csvax.cs.caltech.edu:pub/calc-2.02.tar.Z
    prep.ai.mit.edu:pub/gnu/calc-2.02.tar.Z
  NOTE: Unlike Wolfram Research, Dave has never threatened to sue anyone
    for having a program with a similar command language to Calc.  :-)