Craniofacial prosthetics are not wholly considered cosmetic because they replace the physical form and functional mechanics of the absent anatomy and serve a significant role in the emotional stability and rehabilitation of those suffering from facial defects.
A programmable Logic device refers to any type of integrated circuit that a logic. design can be implemented and reconfigured in the field by the end user. Since these. logic devices can be programmed in the field they are also called Field Programmable. Logic Devices (FPLDs).
Another advantage of a PLC system is that it is modular. That is, you can mix and match the types of Input and Output devices to best suit your application. The first Programmable Logic Controllers were designed and developed by Modicon as a relay re-placer for GM and Landis.