Floppy Disk
A spinning platter of magnetic data storage media which is highly flexible.
GB
Gigabyte.
Hard drive
A spinning platter of magnetic data storage media where the platter is very stiff.
I/O
Input/Output. Data entering and leaving your notebook in electronic form.
I/O Port
The connector and associated control circuits for data entering and leaving your notebook in electronic form.
IDE
Intelligent Drive Electronics. A type of control interface for a hard drive which is inside the hard drive unit.
Infrared
Light just beyond the red portion of the visible light spectrum which is invisible to humans.
Infrastructure
A name of a wireless LAN configuration. This type of communication uses an access point.
Another type of communication is called AdHoc.
IP Address
An address used for computers to communicate in the TCP/IP environment.
Current IPv4 (version 4) uses four values in the range between 1 and 255. (Example: 192.168.100.123).
There are two types of IP address: global address and private address.
The global address is an only address in the world. It is controlled by JPNIC (Japan Network Information Center). A private address is an only address in the closed network.
IR
An abbreviation for infrared.
IrDA
Infrared Data Association. An organization which produces standards for communication using infrared as the carrier.
G l o s s a r y
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.
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.
LPT Port
Line Printer Port. A way of referring to parallel interface ports because historically line printers were the first and latter the most common device connected to parallel ports.
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.
Megahertz
1,000,000 cycles per second.
Memory
A repository for data and applications which is readily accessible to your LifeBook notebook’s CPU.
MHz
Megahertz.
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