Programmable Logic Controllers

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Language: English

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The OSI seven-layer model attempts to provide a way of partitioning any computer network into independent modules from the lowest (physical/hardware) layer to the highest (application/program) layer. Many high-end units even attempt to simulate the inertia of piano keys by using weights, throw-bars, or other mechanisms. It is a vital part of any business entity, whether a sole proprietorship or a multinational corporation. This invention relates to any computer of any form, such as a personal computer and/or microchip, that has an inner hardware-based access barrier or firewall that establishes a private unit that is disconnected from a public unit, the public unit being configured for a connection to a public network of computers including the Internet.

Pages: 192

Publisher: Butterworth-Heinemann (March 13, 1997)

ISBN: 0750631198

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