Quick Reference Guide

328 Glossary

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.

cursor

A marker, such as a block, underscore, or pointer that represents the position at

which the next keyboard or mouse action will occur.

DAT

Acronym for digital audio tape.

Abbreviation for decibel(s).

dBA

Abbreviation for adjusted decibel(s).

Abbreviation for direct current.