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===Allen-Bradley===
In a parallel development, Odo Josef Struger is sometimes known as the "father of the programmable logic controller" as well.<ref name=":1" /> He was involved in the invention of the [[Allen-Bradley]] programmable logic controller<ref name=":2">{{Cite web |url=https://www.controleng.com/articles/a-b-plc-inventor-dr-odo-struger-dies/ |title=A-B PLC Inventor, Dr. Odo Struger, Dies |date=1999-02-01 |website=Control Engineering |url-status=live |archive-url=https://web.archive.org/web/20200224210429/https://www.controleng.com/articles/a-b-plc-inventor-dr-odo-struger-dies/ |archive-date=2020-02-24 |access-date=2020-02-24 }}</ref><ref name="nytimes2">{{cite news |last=Brier |first=Steven E. |url=https://query.nytimes.com/gst/fullpage.html?res=9D00E6DF173FF934A15751C1A96E958260 |title=O. Struger, 67, A Pioneer In Automation |date=1998-12-27 |newspaper=The New York Times |access-date=2020-02-24 |quote=Dr. Odo J. Struger, who invented the programmable logic controller, which makes possible modern factory automation, amusement park rides and lavish stage effects in Broadway productions, died on December 8 in Cleveland. He was 67. }}</ref><ref name="anzovin2">Anzovin, p. 100, item # 2189. ''Programmable logic controller was invented by the Austrian-born American engineer Odo J. Struger in 1958–60 at the Allen-Bradley company in Milwaukee, WI, USA. A programmable logic controller, or PLC, is a simple electronic device that allows precise numerical control of machinery. It is widely used to control everything from washing machines to roller coaster to automated manufacturing equipment.''</ref> and is credited with
===Early methods of programming===
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