114 - Glossary
IrDA
Infrared Data Association. An organization which produces standards for communication using
infrared as the carrier.
IRQ
Interrupt Request. An acronym for the hardware signal to the CPU that an external event has occurred
which needs to be processed.
KB
Kilobyte. One thousand bytes.
LAN
Local Area Network. An interconnection of computers and peripherals within a single limited
geographic location which can pass programs and data amongst themselves.
LCD
Liquid Crystal Display. A type of display which makes images by controlling the orientation of
crystals in a crystalline liquid.
Lithium ion Battery
A type of rechargeable battery which has a high power-time life for its size and is not subject to the
memory effect as Nickel Cadmium batteries.
MAC Address
Media Access Control Address. A unique physical address of a network card. For Ethernet, the first
three bytes are used as the vendor code, controlled and assigned by IEEE. The remaining three bytes
are controlled by each vendor (preventing overlap), therefore, every Ethernet card is given a unique
physical address in the world, being assigned with a different address from other cards. For Ethernet,
frames are sent and received based on this address.
MB
Megabyte. One million bytes.
