It is difficult to define
a single useful model of an I-O device because the number and variety of
such devices is great. Von Neumann simply assumed some ability to communicate
with the outside world!
A computer must communicate
with two very different audiences: machines and humans.
invented the mouse?
Last Updated 2001/10/10
L.Heath, 2000, extensively modified by J.A.N. Lee, 2001.