@bumi Depends a bit on your OS of choice, I would have thought. I'm a Mac guy, but I'm not sure I would buy a MacPro if I was going to run Windows or Linux in it most of the time, nice though the machine is.
@sydneyfalk@dadegroot indeed. I'd be interested in hearing from any Hebrew scholars though. I very much suspect that there might be a few early examples that count as acronyms lurking in Kabbalah, for example. As for 'common use' - well, I guess you need to have a literate population. Interesting, though.