Epson Epson - Manual (Page 180)

Controller
A processor, interface, port, or adapter that translates data
between the CPU and a peripheral device, such as a hard disk,
diskette drive, keyboard, or video monitor. Controllers convert
data from one format to another, match speeds between
devices that operate at different speeds, and isolate peripheral
hardware from software.
CPU
Central Processing Unit. The primary device that interprets
instructions, performs tasks, keeps track of stored data, and
controls input and output operations. See also Processor.
Device
A piece of computer equipment that performs a specific task,
such as a disk drive, a monitor, a printer, or a scanner. Also
called a peripheral.
Device driver
A file containing instructions that allow your computer to
recognize and communicate with a device. The device may be a
printer, monitor, or other type of device.
Dual Inline Package. A type of chip which has two rows of
downward-pointing pins.
DMA
Direct Memory Access channel. A channel for transferring data
from your computer to or from peripherals without involving
the CPU resources.
2 Glossary