Glossary
This glossary defines the special terms, abbreviations, and acronyms that are used
in this publication. If you do not find the term you are looking for, refer to the
index or to the Dictionary of Computing, 1994.
Numbers
2:1 compression
The relationship between the quantity of data that can be stored with
compression as compared to the quantity of data that can be stored
without compression. In 2:1 compression, twice as much data can be stored
with compression as can be stored without compression.
A
A Ampere.
ac Alternating current.
access method
A technique for moving data between main storage and input or output
devices.
adapter card
A circuit board that adds function to a computer.
ADI Automation Drive Interface.
adj Adjustment.
AIX Advanced Interactive Executive. IBM's implementation of the UNIX
®
operating system. The RS/6000 system, among others, uses AIX as it's
operating system.
alphanumeric
Pertaining to a character set that contains letters, numerals, and usually
other characters, such as punctuation marks.
alter To change.
ambient temperature
The temperature of air or other media in a designated area, particularly the
area surrounding equipment.
ampere (A)
A unit of measure for electric current that is equivalent to a flow of one
coulomb per second, or to the current produced by one volt applied across
a resistance of one ohm.
ANSI American National Standards Institute.
archive
To collect and store files in a designated place.
ASCII American National Standard Code for Information Interchange. A 7 bit
coded character set (8 bits including parity check) that consists of control
characters and graphic characters.
© Copyright IBM Corp. 2005, 2010 H-1
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