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instruction: Statements or commands that specify how to perform a particular
task.
interface: 1) Hardware and/or software components of a system used specifically
to connect one system or device to another. 2) To physically connect one system
or device to another to exchange information. 3) The point of contact between
user, the computer, and the program, for example, the keyboard or a menu.
I/O: Input/output. Refers to acceptance 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 connecting two points of a circuit.
K
K: Taken from the Greek word kilo, meaning 1000; often used as equivalent to
1024, or 2 raised to the 10th power. See also byte and kilobyte.
KB: See kilobyte.
keyboard: An input device containing 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 transmitted 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
megabite.
L
Light Emitting Diode (LED): A semiconductor device that emits light when a
current is applied.
LIM-EMS: Lotus-Intel-Microsoft Expanded Memory Specification The standard that
defines expanded memory. See expanded memory.
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.