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data set control block

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  • Data Control Block — In IBM mainframe operating systems, such as OS/360, MVS, z/OS, a Data Control Block (DCB) is a description of a dataset in a program. A DCB is coded in Assembler programs using the DCB macro instruction (which expands into a large number of… …   Wikipedia

  • Data set (IBM mainframe) — This article is about mainframe computer file. For a general meaning in computing field, see Data set. data set (archaic), dataset (preferred), is a computer file having a record organization. The term pertains to the IBM mainframe operating… …   Wikipedia

  • Unit Control Block — In IBM mainframe operating systems from the z/OS line, a Unit Control Block (UCB) is a memory structure, or a control block , that describes any single input/output peripheral device, or a unit , to the operating system.A similar concept in Unix… …   Wikipedia

  • Control theory — For control theory in psychology and sociology, see control theory (sociology) and Perceptual Control Theory. The concept of the feedback loop to control the dynamic behavior of the system: this is negative feedback, because the sensed value is… …   Wikipedia

  • Data-flow analysis — is a technique for gathering information about the possible set of values calculated at various points in a computer program. A program s control flow graph (CFG) is used to determine those parts of a program to which a particular value assigned… …   Wikipedia

  • Data structure alignment — is the way data is arranged and accessed in computer memory. It consists of two separate but related issues: data alignment and data structure padding. When a modern computer reads from or writes to a memory address, it will do this in word sized …   Wikipedia

  • Data Execution Prevention — (DEP) is a security feature included in modern operating systems. It is known to be available in Linux, Mac OS X, and Microsoft Windows operating systems and is intended to prevent an application or service from executing code from a non… …   Wikipedia

  • Data loss prevention software — Data Loss Prevention (DLP) is a computer security term referring to systems that identify, monitor, and protect data in use (e.g. endpoint actions), data in motion (e.g. network actions), and data at rest (e.g. data storage) through deep content… …   Wikipedia

  • Data flow diagram — example.[1] A data flow diagram (DFD) is a graphical representation of the flow of data through an information system, modelling its process aspects. Often they are a preliminary step used to create an overview of the system which can later be… …   Wikipedia

  • Control character — In computing and telecommunication, a control character or non printing character is a code point (a number) in a character set, that does not in itself represent a written symbol. It is in band signaling in the context of character encoding. All …   Wikipedia

  • Control flow — Not to be confused with Flow control. In computer science, control flow (or alternatively, flow of control) refers to the order in which the individual statements, instructions, or function calls of an imperative or a declarative program are… …   Wikipedia

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