Toshiba Portégé M100 User Manual page 261

I/O: Input/output. Refers to accep-
tance and transfer of data to and from
a computer.
I/O devices: Equipment used to
communicate with the computer and
transfer data to and from it.
.
J
jumper: A small clip or wire that
allows you to change the hardware
characteristics by electrically connect-
ing two points of a circuit.
K
K: Taken from the Greek word kilo,
meaning 1000; often used as equiva-
lent to 1024, or 2 raised to the 10th
power. See also byte and kilobyte.
KB: See kilobyte.
keyboard: An input device contain-
ing switches that are activated by
manually pressing marked keys. Each
keystroke activates a switch that
transmits a specific code to the
computer. For each key, the transmit-
ted code is, in turn, representative of
the (ASCII) character marked on the
key.
kilobyte (KB): A unit of data storage
equal to 1024 bytes. See also byte
and megabyte.
L
level 2 cache: See cache.
Light Emitting Diode (LED): A
semiconductor device that emits light
when a current is applied.
Liquid Crystal Display (LCD):
Liquid crystal sealed between two
sheets of glass coated with transparent
conducting material. The viewing-
side coating is etched into character
forming segments with leads that
extend to the edge of the glass.
Applying a voltage between the glass
sheets darkens the liquid crystal to
provide contrast to lighted portions of
the display.
LSI: Large Scale Integration. 1) A
technology that allows the inclusion of
up to 100,000 simple logic gates on a
single chip. 2) An integrated circuit
that uses the large scale integration.
M
main board: See motherboard.
MDA: Monochrome Display Adaptor.
A video display protocol defined by
the IBM Monochrome Display
Adaptor and its associated circuitry
for direct drive TTL displays that
supports a monochrome 720x350 text
mode.
MDA
Glossary-9