L i f e B o o k B S e r i e s – S e c t i o n E i g h t
Disk Drive
The hardware which spins the disk and has the heads and control circuitry for reading and writing the data on the disk.
Diskette
A floppy disk in a hard housing with a shutter.
DMA
Direct Memory Access. Special circuitry for memory to memory transfers of data which do not require CPU action.
DMI
Desktop Management Interface. A standard that provides PC management applications with a common method of locally or remotely querying and configuring PC computer systems, hardware and software compo- nents, and peripherals.
DOS
Disk Operating System
Driver
A computer program which converts application and operating system commands to external devices into the exact form required by a specific brand and model of device in order to produce the desired results from that particular equipment.
ECP
Extended Capability Port. A set of standards for high speed data communication and interconnection between electronic devices.
ESD
Extended Memory
All memory more than the 640KB recognized by
FCC
Federal Communication Commission.
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.
Hexadecimal
A decimal notation for the value of a 4 bit binary number.
I/O
Input/Output. Data entering and leaving your LifeBook in electronic form.
I/O Port
The connector and associated control circuits for data entering and leaving your LifeBook 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.
IR
An abbreviation for infrared.
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.
80