cartridge
storage
slot
Individual
slot
located
within
a
magazine
that
is
used
to
house
tape
cartridges.
caution
(notice)
A
word
to
call
attention
to
possible
personal
harm
to
people.
Contrast
with
attention
and
danger
.
CE
Customer
engineer;
field
engineer;
service
representative.
centimeter
(cm)
One
one-hundredth
of
a
meter
(0.01
m).
Approximately
0.39
inch.
channel
command
An
instruction
that
directs
a
data
channel,
control
unit,
or
device
to
perform
an
operation
or
set
of
operations.
char
Character.
CHK
Check.
cleaning
cartridge
A
tape
cartridge
that
is
used
to
clean
the
heads
of
a
tape
drive.
Contrast
with
data
cartridge
.
command
A
control
signal
that
initiates
an
action
or
the
start
of
a
sequence
of
actions.
compact
disc
(CD)
A
disc,
usually
4.75
inches
in
diameter,
from
which
data
is
read
optically
by
means
of
a
laser.
compression
The
process
of
eliminating
gaps,
empty
fields,
redundancies,
and
unnecessary
data
to
shorten
the
length
of
records
or
blocks.
concurrent
Refers
to
diagnostic
procedures
that
can
be
run
on
one
control
unit
while
the
rest
of
the
subsystem
remains
available
for
customer
applications.
contingent
connection
A
connection
between
a
channel
path
and
a
drive
caused
when
a
unit
check
occurs
during
an
I/O
operation.
controller
A
device
that
provides
the
interface
between
a
system
and
one
or
more
tape
drives.
CP
Circuit
protector.
ctrl
Control.
CU
Control
unit.
D
danger
(notice)
A
word
to
call
attention
to
possible
lethal
harm
to
people.
Contrast
with
attention
and
caution
.
data
Any
representations
such
as
characters
or
analog
quantities
to
which
meaning
is
or
might
be
assigned.
Glossary
G-3
Summary of Contents for H4S
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