TOPS-10 Monitor Calls Manual Volume 2 AA-K039D ... - Trailing-Edge

GLOSSARY'
Locked job
A job in core that is never a candidate for swapping or
shuffling.
Logged-in UFD
The UFD that corresponds to the project-programmer number
which the user is logged in.
under
Logical device name
An alphanumeric name you choose to represent a physical device.
This name can be used synonymously with the physical device name
in all references to the device. Logical device names allow
device independence in that the most convenient physical device
can then be associated with the logical name at run time.
Logical names take precedence over physical names. With the
exception of disks, only one logical name can be associated with
a physical name.
Logical record
A collection of related items stored together.
have:
It is possible to
1. Several logical records stored in a single physical record.
2. Each logical record stored in a single physical record.
3. Each logical record occupy one or more physical records.
4. Logical records span several physical records, and at the
same time, have more than one logical record in a single
physical record.
LOGIN
The system program by which the system users gain access
computing system.
to the
Lost time
The time that the null job was running, while at least one other
job wanted to run (was not waiting for a device) but could not
because one of the following was true:
1. The job was being swapped out.
2. The job was being swapped in.
3. The job was on disk waiting to be swapped in.
4. The job was momentarily stopped so devices could become
inactive in order to shuffle jobs in core.
Low segment
The segment of user virtual address space beginning at zero. It
contains the Job Data Area and I/O buffers. The length of the
low segment is stored in location .JBREL of the Job Data Area.
When writing two-segment programs, it is advisable to place data
locations and impure code in the low segment.
Gloss-21