What I still find fascinating about the Apple machines of the OldWorld era is not how small the on-disk system was but how much they tried to stick in ROM. My Centris 660AV had <i>QuickTime</i> burnt into the ROM chip. Of course, before anyone used the machine there was a software update to QuickTime so there was no point.<p>We also had a Mac Classic that has a whole system disk in ROM that you could boot from if you held down a secret key combo.