7) First computer to sell more than 1,000
One of the S/360s went into the four digits. I am not sure which one
(model 40?). 1401s may have beaten though.
8) " " "
" " " 10,000
PDP-8, probably.
9) First computer to use a floppy disk (any kind of
floppy)
One of the device controllers for the S/360s. The original intent of the
floppy was to distribute microcode updates.
William Donzelli
william(a)ans.net