Dell PowerEdge 400SC - Manual (Page 23)

host adapter
A host adapter implements communication between the system's bus and the controller for a peripheral device. (Hard-drive controller subsystems include
integrated host adapter circuitry.) To add a SCSI expansion bus to your system, you must install or connect the appropriate host adapter.
Hz
Hertz
I/O
Input/output. A keyboard is an input device, and a monitor is an output device. In general, I/O activity can be differentiated from computational activity.
ID
Identification
IDE
Integrated drive electronics
integrated mirroring
Provides simultaneous physical mirroring of two drives. Integrated mirroring functionality is provided by the system's hardware. See also mirroring.
internal processor cache
An instruction and data cache built into the processor
IP
Internet Protocol
IPX
Internetwork Packet eXchange
IRQ
Interrupt request. A signal that data is about to be sent to or received by a peripheral device travels by an IRQ line to the processor. Each peripheral
connection must be assigned an IRQ number. Two devices can share the same IRQ assignment, but you cannot operate both devices simultaneously.
jumper
Small blocks on a circuit board with two or more pins emerging from them. Plastic plugs containing a wire fit down over the pins. The wire connects the pins
and creates a circuit. Jumpers provide a simple and reversible method of changing the circuitry in a board.
K
Kilo-, indicating 1000
Kb
Kilobit(s); 1024 bits
KB
Kilobyte(s);1024 bytes
Kbps
Kilobit(s) per second