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Commodore 128D - Page 405

Commodore 128D
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H
Data:
Numbers,
letters
or
symbols
that
are
input
into
the
computer
to
be
processed.
Data
Base:
A
large
amount
of
data
stored
in
a
well-organized
man
ner.
A
data-base
management
system
is
a
program
that
allows
access
to
the
information.
Data
Link
Layer.
A
logical
portion
of
data
communications
control
that
mainly
ensures
that
communication
between
adjacent
devices
is
error
free.
Data
Packet:
A
means
of
transmitting
serial
data
in
an
efficient
package
that
includes
an
error-checking
sequence.
Data
Rate
or
Data
Transfer
Rate:
The
speed
at
which
data
is
sent
to
a
receiving
computer—given
in
baud,
or
bits
per
second
(bps).
Datassette:
A
device
used
to
store
programs
and
data
files
sequen
tially
on
tape.
Debug:
To
correct
errors
in
a
program.
Decay:
The
rate
at
which
the
volume
of
a
musical
note
decreases
from
its
peak
value
to
a
mid-range
volume
called
the
sustain
level.
See
Sustain.
Decrement:
To
decrease
an
index
variable
or
counter
by
a
specific
value.
Dedicated
Line
or
Leased
Line:
A
special
telephone
line
arrange
ment
supplied
by
the
telephone
company,
and
required
by
cer
tain
computers
or
terminals,
whereby
the
connection
is
always
established.
Delay
Loop:
An
empty
FOR...
NEXT
loop
that
slows
the
execution
of
a
program.
Dial-Up
Line:
The
normal
switched
telephone
line
that
can be
used
as
a
transmission
medium
for
data
communications.
Digital:
Of
or
relating
to
the
technology
of
computers
and
data
com
munications
where
all
information
is
encoded
as
bits
of
1s
or
Os
that
represent
on
or
off
states.
401
GLOSSARY

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