> Why not; not much different conceptually after
all
 > from early systems using open-reel mag tape, or
 > even punch(ed) cards. 
On Mon, 21 Sep 2015, tony duell wrote:
  I feel there are 2 distinct types of cassette system
from the
 user perspective.
 The first is the sort used on 1980s home computers with a
 standard or slightly modified (Commodore, Atari) audio
 cassette recorder. These needed considerable manual
 . . .
 The second has the tape mechanism under computer control
 . . .
 The second type would seem to be entirely useable for
 'business' computing before floppy drives were
 available. I am not so sure about the first type :-) 
and, of course, as a third type, Exatron Stringy-Floppy
computer based, but NOT entirely usable.