IBM Ultrium Gen 6, Installation And User Manual

Page: 103 / 118

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.
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.
assigning a device
The establishing of the relationship of a
device to a running task, process, job, or
program.
assignment
The naming of a specific device to
perform a function.
asynchronous
Pertaining to two or more processes that
do not depend upon the occurrence of
specific events such as common timing
signals.
attention (notice)
A word for calling attention to the
possibility of danger to a program, device,
or system, or to data. Contrast with
caution and danger .
ATTN Attention.
B
backup
To make additional copies of documents
or software for safekeeping.
bar code
A code representing characters by sets of
parallel bars of varying thickness and
separation which are read optically by
transverse scanning.
bar code label
Paper bearing a bar code and having an
adhesive backing. The bar code label
must be affixed to a tape cartridge to
enable the library to identify the cartridge
and its volume serial number.
bar code reader
A laser device specialized for scanning
and reading bar codes and converting
© Copyright IBM Corp. 2013
85