'Programmable Logic Controllers (PLCs) and Programming Concepts - with Electrical, Pneumatic, and Hydraulic Applications' is an introductory textbook dealing with programmable electronic control systems. The book describes the hardware and software aspects of PLCs, in detail. The book also presents the programming using bit logic, timing, and counting instructions to control some electrical, pneumatic, and hydraulic systems. The hardware and software aspects of PLCs are presented in a logical sequence and simple to understand language. Many instructions in SIEMENS, Allen Bradley, and OMRON PLCs are explained for a comparative study. Simple to medium complexity exercises in electrical, pneumatics and hydraulic fields are chosen to assist readers' logical thinking and prepare them for more complex programming tasks.