ABB programmable logic controller (PLC) and programmable automation controller (PAC) range from large to small and even micro applications. We offer different controller types and sizes to fit your specific needs. From the original programmable logic controller (PLC) invented in the 1970s to the scalable, multi-disciplined and information-enabled programmable automation controller (PAC), Allen‑Bradley® control systems help you meet complex to simple application requirements. With multi-disciplined control solutions built focusing on controllers and I/O and combined with attachment portfolios, you can deliver a smart, productive and secure Integrated Architecture® system in discrete, process, motion, and safety applications. We have got you covered.