寻求有关PLC发展方面的英文文章

你是学什么的？
建议你去找CIE（Cambridge International Exam）Business Studies AS/A-Level去看看。
还有，PLC可以是 Public Limited Company，也可能是 Product Life Cycle 你指的是什么？

Programmable logic controller
A programmable logic controller (PLC), or programmable controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result.

PLC and Programmable Logic Controller are registered trademarks of the Allen-Bradley Company, although they are widely