For a while, I saw www.sun3arc.org had downloads of SunOS for Sun3 machines. They don't seem to be up now, but still have a DNS so I'm not sure what's up there. At introduction, LaserWriters had the interesting distinction of being more powerful than the Mac that drove them. I dimly remember this explanation of Resolution Enhancement (don't know if it's marketer-speak or not): The printer only prints 300 (600, whatever) DPI, but along the edges of curves those dots can be made smaller even though there aren't any more of them. The result is smoother looking curves