SNMP Reference Guide

738 Glossary
config.sys file
The config.sys file is executed when you boot your computer (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.
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 computer 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 computers.
COO
Acronym for cost of ownership.
cooling unit
Sets of fans or other cooling devices in a system chassis.
coprocessor
A chip that relieves the computer’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.