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I/O Port

I/O stands for input/output. I/O is the communication between a computer and its user, its storage devices, other computers (via a network) or the outside world. The I/O port is the logical channel or channel endpoint in an I/O communication system.

IDE

Stands for integrated drive electronics. Describes a hard disk with the disk controller integrated within it. See also EIDE.

IRQ

Stands for interrupt request. IRQ is the name of the hardware interrupt signals that PC peripherals (such as serial or parallel ports) use to get the processor's attention. Since interrupts usually cannot be shared, devices are assigned unique IRQ addresses that enable them to communicate with the processor. Peripherals that use interrupts include LAN adapters, sound boards, scanner interfaces, and SCSI adapters.