@jnskm @hu_logic @dyslexxicon @rodhilton The original Mac OS had the OS, the Finder, MacPaint, and MacWrite on a 400K floppy and running in 128K or RAM. Bill Atkinson was a genius. (Having a lot of the GUI in ROM also helped; it's why the Mac was much slicker to use, relative to hardware speed, than equivalent x86 systems running GUIs until probably the late 90s.)