computer
S}'5teDl.:
A
computer
2nd
ilS
peripheral
devices
viewed
as
2 working entily. Often the term
mcludes softW2re.
connectOr:
A
p1U&
socket,
pck,
or
port.
connea
time:
11lc:
amount
of
time
you
spend
communiatmg
with
an
information service.
continuous-form
paper: See
pin-feed
paper.
contrast
knob:
A dial
on
your video monilor for
adjuSting
!.he
relative brightness
of
characters
2nd
background
on
!.he
screen.
Control:
A specific key
on
an
Apple
II
system
keyboard
U'l2l
prcx.luces
control
dlarnCters
when
pressed
in
combination with ano!.her key
or
keys.
control
character:
Any
key
combination that
includes pressing the
Control
key. Control
characters perform
aaions
rather
than
appearing
as
text
charaaers.
For
example,
Conll"ol-G causes
the
speaker
to
beep,
and
Com.rol-M returns
lhe
cursor
or
prinl
he2d
to
the
left /tUIrgin. Conll"ol
charaaers
are assigned
ASOI
values 0 through
}1
and
can
be
written
into
programs using
ASClI
codes
control
key:
A general
term
fer any key
on
2
computer
keyboud
tNt
conll"Ots
the
operation
of
other
keys, for eX2mple.
C2PS
Lock, Control,
Apple, Option,
and
ShifL
When
you
hold
down
or
engage
2 control
key
while pressing another key,
the
combin2tion
/tUIkes
tNt
other
key
behave
differently_ Sometimes called a modifier
key.
Control
key: A specific key
on
Apple II-family
keyboards
that produces
control
characters
when
used
in combination with
other
keys.
controller
card:
An
interface
card
that connects a
device such
as
a printer
or
disk drive to a
computcr's
main
logic
board
and
controls
the
operation
of
!.he
device;
most
commonly
refers
to
2 card that controls disk drives.
148
Glossary
co-processor:
A microproc:essor device
tNt
overrides
or
works with the microprocessor
on
the
m2ln logic
baud_
copy
protect:
To
/tUIke
a disk
uncopyable
SoflW2re publishers frequenlly
try
to
copy
protect
their
disks
to
prevent
them
from
being
illegally
duplioued
Compare
wrhe
protect.
COUJ'Se'l\'3re
See
educatlonal
software.
CP/M:
Stands for Control
Program
for
Microprocessors. An
operating
system
that works
with the
Z80
microprocessor.
CPU: Stands for central
processing
unit. See
microprocessor.
cursor:
A blinking undcrline, rectangle. bar,
or
or.her symbol that marks
the
place
on
the
screen
where the nexi character will appear. In
some
applications,
the
cursor is called
the
polnler.
O-shaped
connectOr:
A
connector
wider at the
top
than at
the
bottom.
D-shaped
connectors
come
in a variely
of
pin
opacities
and
tave
either
thumscrcws
or
other
screws
on
their sides
10
secure
the
plug
10
the socket.
daisy-chain:
To
connect
a
series
of
perip~ral
devices
one
to
another.
daisy
whed:
A printing
element
staped
like a
daisy:
ch2raeters 2re al
the
end
of
°peuLs-
radiating
from 2 central
hub.
Once
in pl2ce insidc
the printer, the
clemenl
spins
to
move
c2ch
letter
into position
as
needed
for printing. Sometimes
called a
print wheel.
daisy
wheel
printer:
A printer that uses a
daisy
wheel
to
print charactcrs
on
paper.
data:
lnrormation, especially information
used
and
operatcd
on
by
a program. The smallcst unit
of
informalion a
computcr
can
process
is
a
hil.
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