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Synopsis
Excerpt from Hierarchical Control System
Hierarchical design is common in computer programs. The reason is two fold. The first is for the user's/programmer's convenience. For instance, an operating system might present disk storage to the programmer as se quential and random access files, hiding the specific details of disk access and file maintenance. Ou top of this are developed text files, indexed files, relational databases, and so 011. Thus the user or programmer is presented with, familiar abstractions suitable for the task at hand. Secondly, hierar chical programming is good software engineering. If one considers a system as having the raw devices on the bottom and the application programs on the top then hierarchical programming represents vertical modularity and all the various advantages of modular programming apply. The specification for each step in the hierarchy can be precisely stated simplifying develop ment. Changes in the underlying hardware need not propagate changes throughout the system but can be handled by the lower levels of the hier archy. Programming modifications and Optimizations can be applied at the appropriate level(s) again without disrupting the entire system.
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Hierarchical Control System (Classic Reprint)
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Hierarchical Control System (Classic Reprint)
Seller: PBShop.store US, Wood Dale, IL, U.S.A.
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HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9780267953202
Quantity: 15 available