Glossary
Sources: SR20-1078 System/360 Operator's Reference Guide
GC33-5380
DOSNS
Service Aids and Procedures
GC20-1699 DP Glossary
NOTE: Asterisk before term indicates American National Standard Institute (ANSI)
definition.
a
access method: A technique for moving data between main storage and an input/output
device.
address constant: A number, or a
symbol representing a number, used
in
calculating storage
addresses.
address translation: The process
of
changing the address of an item of data or
an
instruction
from its
virtual address
to
its real storage address. See also dynamic address translation.
alias:
Another name for a member
of
a partitioned data set; another entry point
of
a program.
allocate:
Assign
a resource
to
a job
or
task.
asynchronous: Without
regular time relationship; unexpected
or
unpredictable with respect
to
the execution of a program's instructions.
attribute: A trait; for
example, attributes
of
data include record length, record fermat, data
set name, associated device type and
volume identification, use, creation date, etc.
auxiliary storage: Data storage other than main storage. Synonymous with external storage,
secondary storage.
b
basic access method: Any access method
in
which each input/output statement causes a
machine input/output operation
to
occur. (The primary macro instructions used are
READ
and WRITE.)
basic control mode:
When
PSW
bit 12
is
0,
PSW
format and system operation are compatible
with standard System/360 operation. This isthe basic control mode
in
which control registers
0,8,
and 14 are available
to
the system. Abbreviated
to
BC
mode. See also "Extended Con·
trol Mode."
batch processing: (See stacked job processing.)
block (records):
1.
To group records
to
conserve storage space or
to
increase the efficiency
of
access
or
processing.
2.
A blocked record. 3. A portion
of
a telecommunications message
defined as a unit
of
data transmission.
block loading: Bringing the control section
of
a
load
module into adjoining positions
of
main storage.
BT
AM
(basic telecommunications access method): A basic access method
that
permits a
READIWRITE communication with remote devices.
buffer (program input/output): A portion of main storage into which data
is
read,
or
from
which it
is
written.
c
catalog: 1. The collection
of
all
data set indexes maintained by data management.
2.
To in·
elude
the volume identification of a data set
in
the catalog. 3.
In
DOS
to
add a program to a
library.
cataloged
data set: A data set that
is
represented
in
an index
or
series
of
indexes.
cataloged procedure: A set
of
job control statements
in
the SYS1.PROCLIB data set. The
procedure can be used by naming it
in
an execute (EXEC) statement.
CAW
(channel address word): A ward
in
main storage
at
location 72
that
specifies the
loca-
tion
in
main storage where a channel program begins.
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