I have a license for a very expensive program which I have been updating for over ten years. That program is Mathematica. As soon as I discovered that it was available for Linux, I switched my license from Windows to Linux. Companies such as Adobe have toyed with the idea of providing their products for Linux, but backed off. Part of the reason vendors shy away from supporting Linux versions of they products seems to be a hostility on the part of the FOSS community toward closed source products. Personally, I don't mind paying Wolfram Research to produce a powerful product, and feed a handful of talented Mathematicians. The value WRI returns to the world is far in excess of the money paid for their products. http://mathworld.wolfram.com/ http://functions.wolfram.com/ http://scienceworld.wolfram.com/ http://www.mathmlcentral.com/ And this site was maintained for years by the person who manages/moderates the Mathematica mailinglist and newsgroup. http://sunfreeware.com/ To this day, I still go to http://smc.vnet.net to find the address. What do others think about the place of closed source, proprietary software running on Linux? Steven