21. An SRB is a highly-optimized instance of a Process control block in these MVS / 370 and successor systems. 22. A TCB is a general-purpose instance of a Process control block in these OS / 360 and successor systems. 23. Control blocks are accessed only indirectly by calls to subroutines within the component that " owns " the control block.24. Control blocks are accessed only indirectly by calls to subroutines within the component that " owns " the control block . 25. Agra made the announcement after Newcourt acquired the Torchinsky family's control block of 1 . 56 million Class A shares. 26. The current size of a file was maintained in the file's file control block ( FCB ) by the operating system. 27. Such credits could be used, for example, when a barter, or trading, company already controls blocks of time and space for advertising. 28. An SRB is similar to a Process Control Block ( PCB ), in that it identifies a unit of work to the system. 29. The hidden parameter permits, for example, a file I / O gate to contain the address or handle of the file control block . 30. In order to allow COBOL programmers to access CICS control blocks and dynamic storage the designers resorted to what was essentially a hack.
