NEC POWERMATE PROFESSIONAL 9000 Service Manual page 281

Glossary-5
megabyte
(MB) 1,048,576 bytes.
memory
Electronic storage area in a computer that retains information and programs. A computer
has two types of memory - read-only memory (ROM) and random access memory (RAM).
menu
A video display of programs or options.
microprocessor
A semiconductor central processing unit that is the principal component of a
microcomputer. Usually contained on a single chip that includes an arithmetic logic unit,
control logic, and control-memory unit.
millisecond
(ms) One-thousandth of one second; 0.001 second.
mode
A method of operation; for example, the system operates in either normal or power-saving
mode.
modem
MOdulator-DEModulator. A device that links computers over a telephone line.
NLX
An industry standard system board form factor that standardizes board dimensions and
mechanical and electrical interfaces. The board is designed to be free of cabling, and is
secured with only an insertion/extraction latch, so there are no screws to locate and remove
if the board is being handled.
nonvolatile memory
Storage media that retains its data when system power is turned off. Nonvolatile memory in
your system is a complementary metal oxide semiconductor (CMOS) chip which is backed
up by a battery. The backup battery preserves the clock/calendar data and system
configuration parameters stored in CMOS. See volatile memory.
operating system
Set of programs that manage the overall operation of the computer.