Wolfram Research came out with a $250 Home edition of Mathematica. Regular licenses of Mathematic were expensive and out of reach for individual users, except in the academic market. I used to own three different academic licenses of Mathematica in the past (1.0, 2.0, and 4.0) for the PC and Mac. I tried installing the last copy of Mathematica that I had and was unable to activate it, and the Mathematica support would not issue a new license because I was not a current student. I thought about paying for a course in the local community college just to get...