Page 80 - slides.dvi

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I/O
Operating
hard
They
Wide
Unit
Systems
Data
Data
Error
to
I/O
—
of
Human
I/O
Machine
differ
Direction
rate
variety
Hardware
Complexity
of
present
of
Subsystem
of
handling
a
transfer
readable:
Communications:
subsystem
readable:
representation
transfer
is
significantly
control
‘devices’
uniform
disks,
from
graphical
modems,
I/O
which
generally
one
tapes,
the
system
network
displays,
CD,
interact
another
which
with
sensors
with
interfaces
the
keyboard,
‘messiest’
masks
regard
all
part
mouse,
of
to:
computer
via
OS.
printers
complexity
I/O:
76