Digital Equipment DECpc AXP 150 User Information page 105

cache memory
A small, high-speed memory placed between slower main
memory and the processor. A cache increases effective memory
transfer rates and processor speed. It contains copies of data
recently used by the processor and fetches several bytes of data
from memory in anticipation that the processor will access the
next sequential series of bytes. The system contains a backup
cache located in discrete circuits on the system module and two
on-chip internal caches located in the DECchip 21064 CPU chip.
caddy
The holder for inserting a compact disc into a compact disc drive.
CD-ROM
Compact disc read-only memory. An optical removable media
type. It is also called a compact disc.
central processing unit (CPU)
See CPU.
channel
A path along which digital information can flow in a computer.
CISC
Complex instruction set computer. An instruction set consisting
of a large number of complex instructions that are managed by
microcode. Contrast with RISC.
client/server computing
An approach to computing that enables personal computer
and workstation users—the client—to work cooperatively with
software programs stored on a mainframe or minicomputer—the
server.
CMOS
Complementary metal-oxide semiconductor. A silicon device
formed by a process that combines PMOS and NMOS
semiconductor material.
compact disc
See CD-ROM.
Glossary–3