Unit Control Block
id:
unit-control-block-299-11497773
title:
Unit Control Block
text:
In IBM mainframe operating systems OS/360 and its successors, a Unit Control Block (UCB) is a memory structure, or a control block, that describes any single input/output peripheral device (unit), or an exposure (alias), to the operating system. Certain data within the UCB also instructs the Input/Output Supervisor (IOS) to use certain closed subroutines in addition to normal IOS processing for additional physical device control. Some other operating systems have similar structures.
brand slug:
wiki
category slug:
encyclopedia
description:
Component of IBM mainframe operating systems
original url:
https://en.wikipedia.org/wiki/Unit_Control_Block
date created:
date modified:
2023-12-09T00:38:50Z
main entity:
{"identifier":"Q7887089","url":"https://www.wikidata.org/entity/Q7887089"}
image:
fields total:
13
integrity:
14