Old news to Linux/Unix people...great discovery for this newbie.
Ubuntu Linux, at least (probably others, too) come standard, and for free with "Open Office". Open Office is a suite of applications including a Word Processor, Spread Sheet, and Presentation maker, very similar (so far, to me, practically identical) to Microsof Office, and they will write files in formats compatible with MS Office.
I just tested the compatibility and yep....a document generated in Linux is something that MS is very happy with, with no complaints.
Makes the chance of me ever buying software from MS (Except for the Flight Simulator*) again, ever! That warms my heart.
*I've found a flight simulator for Linux that I simply MUST try. I don't think it's ported for PS3 architecture yet, though, so I've got to try it on my PC/Linux setup. If it's all they say it is...Bye-Bye, MS!!!!