These Categories include some comprehensive Automation circuits. Each automation category provides a focused treatment of specialized circuits of design automation. One area where discrete event systems are currently used is the design of control systems based on programmable logic controllers (PLCs). PLC technology is mostly evolving into some of those projects. Control functions of many types at many different levels. of complex systematic development of real industrial applications including modeling and control systems, Industrial practice, etc. For home automation or teaching purposes about Open Systems, Building Automation, Home Automation, Industrial, Transportation, Utility, Unique Solutions, etc.