Epson 4000 - Manual (Page 138)

Parallel
An interface that transmits data simultaneously over separate
wires in a cable. See also Serial.
Pathname
The directory name(s) you specify to locate a file. For example,
the pathname for the file SALES, stored in the subdirectory
BUSINESS, is \BUSINESS\SALES.
Power-on diagnostics
Tests stored in a computer’s ROM that the computer runs to
check its internal circuitry, peripheral device configuration, and
operating status each time you turn it on or reset it.
Processor speed
See Operating speed.
RAM
Random Access Memory. The area of the computer’s memory
used to run programs and store data while you work. All data
in RAM is erased when you turn off or reset the computer.
Read/write head
The physical device inside a disk or tape drive that reads data
from and writes data to the magnetic surface of the disk or tape.
Real-time
clock
A clock inside the computer that keeps track of the time and
date, even when the computer is turned off, by using power
from a backup battery.
6
Glossary