By M. Susan Hodges
Pcs: structures, phrases and Acronyms is THE technical reference for non-technical those that have to comprehend info know-how. The ebook includes narrative assurance of IT strategies and structures written in simple English for non-technical humans. It additionally includes greater than 3,700 definitions of normal technical phrases and acronyms, and the commonest items utilized in IT. those definitions contain the identify and URL of the seller. This e-book has been published every year in view that 1989. it truly is now in its 14th version and is the significant other connection with TechRef, the single on-line IT database designed particularly for the non-technical expert. TechRef comprises greater than 14,000 entries and makes use of the power of a web method to go looking for info, construct lists of information, and supply new info - 24/7.
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Additional info for Computers: Systems, Terms and Acronyms, 14th Edition
They could, for example, use one monitor for MVS (the operating system), another to monitor the hardware in the system, another for DB2 (database), and yet another for CICS (communications). Some of these programs also provide capacity planning functions, so an installation will know when its needs outgrow its present system. Another very common system enhancement is cost-accounting software. These programs vary in sophistication, but all provide some kind of chargeback system for using computer center resources.
These operating systems manage the execution of both batch and online programs. Batch program execution is handled through Job Control Language (JCL) and commands. JCL is identified by the name of the operating system, which often has the letters "OS" somewhere in the name and is used to control the execution of batch jobs. JCL is used mostly by programmers and is a series of statements that define such things as the programs to be executed and the data files the programs will process. JCL, like programming languages, has a predefined vocabulary and syntax (rules for such things as punctuation and word order) that must be learned.
Commands can be used to control online program execution, but are more commonly used to control peripheral devices. Commands are usually used one at a time rather than in a series like JCL. The operating system responds to operator commands by messages direct to the console. Online programs execution is handled through communications control systems and GUIs (Graphic User Interfaces). The larger the computer, however, the more complex the operating system. And the more complex the operating system, the harder it is to learn.