Task Control Block - definição. O que é Task Control Block. Significado, conceito
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O que (quem) é Task Control Block - definição

INSTANCE OF A PROCESS CONTROL BLOCK WITHIN IBM OS/360 AND SUCCESSOR SYSTEMS
Request Block

Task Control Block         
<architecture> An MVS control block used to communicate information about tasks within an address space that are connected to an MVS subsystem such as MQSeries for MVS/ESA or CICS. {FAQ (http://www-4.ibm.com/software/ts/mqseries/library/manuals/csqfao/CSQFAO22.HTM)}. (2000-12-30)
File Control Block         
DATA STRUCTURE USED FOR FILE ACCESS IN CP/M, MS-DOS AND COMPATIBLE OPERATING SYSTEMS
File control block; Disk Transfer Area
A File Control Block (FCB) is a file system structure in which the state of an open file is maintained. A FCB is managed by the operating system, but it resides in the memory of the program that uses the file, not in operating system memory.
file control block         
DATA STRUCTURE USED FOR FILE ACCESS IN CP/M, MS-DOS AND COMPATIBLE OPERATING SYSTEMS
File control block; Disk Transfer Area
<operating system> (FCB) An MS-DOS data structure that stores information about an open file. The number of FCBs is configured in CONFIG.SYS with a command FCBS=x,y where x (between 1 and 255 inclusive, default 4) specifies the number of file control blocks to allocate and therefore the number of files that MS-DOS can have open at one time. y (not needed from DOS 5.0 onward) specifies the number of files to be closed automatically if all x are in use. (1995-03-21)

Wikipédia

Task Control Block

The Task Control Block (TCB) contains the state of a task in, e.g., OS/360 and successors on IBM System/360 architecture and successors.