Users Guide

124 Glossary
CLI
Abbreviation for command line interface.
cm
Abbreviation for centimeter(s).
CMOS
Acronym for complementary metal-oxide
semiconductor. In systems, CMOS memory chips are
often used for NVRAM storage.
COMn
The device names for the first through fourth serial
ports on your system are COM1, COM2, COM3, and
COM4. The default interrupt for COM1 and COM3
is IRQ4, and the default interrupt for COM2 and
COM4 is IRQ3. Therefore, you must be careful when
configuring software that runs a serial device so that
you don't create an interrupt conflict.
config.sys file
The config.sys file is executed when you boot your system
(before running any commands in the
autoexec.bat file).
This start-up file contains commands that specify which
devices to install and which drivers to use. This file also
contains commands that determine how the operating
system uses memory and controls files.
ConsoleOne
Novell ConsoleOne is a Java-based foundation for
graphical utilities that manage and administer network
resources from different locations and platforms.
ConsoleOne provides a single point of control for all
Novell and external products.
controller
A chip that controls the transfer of data between the
microprocessor and memory or between the
microprocessor and a peripheral device such as a disk
drive or the keyboard.
control panel
The part of the system that contains indicators and
controls, such as the power switch, hard drive access
indicator, and power indicator.
conventional memory
The first 640 KB of RAM. Conventional memory is
found in all systems. Unless they are specially designed,
MS-DOS
®
programs are limited to running in
conventional memory.
COO
Abbreviation for cost of ownership.
cooling unit
Sets of fans or other cooling devices in a system chassis.
coprocessor
A chip that relieves the system's microprocessor of
specific processing tasks. A math coprocessor, for
example, handles numeric processing. A graphics
coprocessor handles video rendering. The Intel
®
Pentium
®
microprocessor, for example, includes a
built-in math coprocessor.
cpi
Abbreviation for characters per inch.
CPU
Abbreviation for central processing unit. See also
microprocessor.
CRC
Abbreviation for cyclic redundancy code, which is a
number derived from, and stored or transmitted with,
a block of data in order to detect corruption. By
recalculating the CRC and comparing it to the value
originally transmitted, the receiver can detect some
types of transmission errors.
CSR
Abbreviation for certificate signing request.