Ciao Fabrizio, > (2) to check whether maxima is running under > windows or linux? > I don't know a better solution, but this works for me: whichos():= if ?length(?\*autoconf\-win32\*) = 4 then system("Viva Gates !") else system("Viva Torvalds !")$ -- -------------------------- Mario Rodriguez Riotorto www.biomates.netnet