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Glossary
Accessspeed
The length of time it takes for an information storage device,
such as memory or a disk drive, to return a piece of data
requested by another device. For example, your computer’s
SIMMs return data requested by the microprocessor at an
access speed of 70ns or 80ns (nanoseconds).
A d d r e s s
A number or name that identifies the location where
information is stored in a computer’s memory.
ASCII
American Standard Code for Information Interchange. A
standardized numeric coding system for representing
characters, such as numbers, letters, and graphic symbols. Each
of the 256 ASCII codes occupies one byte of storage. All
computers, printers, and programs can use files transmitted in
standard ASCII code. Extended ASCII codes can be used only
by hardware and software designed to interpret them.
Asynchronous
A method of data transmission in which one machine sends
data, one character at a time, to another machine at variable
intervals that do not need to be synchronized to a timing
device, such as a system clock.
Base memory
See Conventional memory.
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