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fDesc[0] = "Programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes. We still use the &quot;ladder logic&quot; which resembles the relay logic of earlier systems.<br /> <br /> CLICK Programming Software is used to program the CLICK PLCs. This is a freeware. The company produces many low cost PLCs and are a good way to start learning PLCs.";

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