Programmable logic controller (English Wikipedia)

Parr 1998, p. 438 Parr, E. A. (1998). "Computers and industrial control". Industrial Control Handbook. Industrial Press Inc. ISBN 0-8311-3085-7 – via Google Books.
Laughton & Warne 2002, p. 16/3: "The first industrial computer application was probably a system installed in an oil refinery in Port Arthur USA in 1959. The reliability and mean time between failure of computers meant that little actual control was performed." Laughton, M. A.; Warne, D. F. (2002). Electrical Engineer's Reference Book (16th ed.). Newnes. ISBN 9780750646376 – via Google Books.
Parr 1998, p. 437 Parr, E. A. (1998). "Computers and industrial control". Industrial Control Handbook. Industrial Press Inc. ISBN 0-8311-3085-7 – via Google Books.
Bolton 2015, p. 6 Bolton, William (2015). Programmable Logic Controllers (6th, revised ed.). Newnes. ISBN 9780081003534 – via Google Books.
Parr 1998, pp. 438, 450–451 Parr, E. A. (1998). "Computers and industrial control". Industrial Control Handbook. Industrial Press Inc. ISBN 0-8311-3085-7 – via Google Books.
Laughton & Warne 2002, chpt. 16 Laughton, M. A.; Warne, D. F. (2002). Electrical Engineer's Reference Book (16th ed.). Newnes. ISBN 9780750646376 – via Google Books.
Bolton 2015, p. 5 Bolton, William (2015). Programmable Logic Controllers (6th, revised ed.). Newnes. ISBN 9780081003534 – via Google Books.
Bolton 2015, p. 7 Bolton, William (2015). Programmable Logic Controllers (6th, revised ed.). Newnes. ISBN 9780081003534 – via Google Books.
Bolton 2015, pp. 12–13 Bolton, William (2015). Programmable Logic Controllers (6th, revised ed.). Newnes. ISBN 9780081003534 – via Google Books.
Bolton 2015, pp. 23–43 Bolton, William (2015). Programmable Logic Controllers (6th, revised ed.). Newnes. ISBN 9780081003534 – via Google Books.
Bolton 2015, pp. 16–18 Bolton, William (2015). Programmable Logic Controllers (6th, revised ed.). Newnes. ISBN 9780081003534 – via Google Books.
Bolton 2015, pp. 19–20 Bolton, William (2015). Programmable Logic Controllers (6th, revised ed.). Newnes. ISBN 9780081003534 – via Google Books.
Lin, Sally; Huang, Xiong (9 August 2011). Advances in Computer Science, Environment, Ecoinformatics, and Education, Part III: International Conference, CSEE 2011, Wuhan, China, August 21-22, 2011. Proceedings. Springer Science & Business Media. p. 15. ISBN 9783642233449 – via Google Books.
Parr 1998, p. 446 Parr, E. A. (1998). "Computers and industrial control". Industrial Control Handbook. Industrial Press Inc. ISBN 0-8311-3085-7 – via Google Books.
Laughton & Warne 2002, section 16.4.8 Laughton, M. A.; Warne, D. F. (2002). Electrical Engineer's Reference Book (16th ed.). Newnes. ISBN 9780750646376 – via Google Books.
Parr 1998, p. 451 Parr, E. A. (1998). "Computers and industrial control". Industrial Control Handbook. Industrial Press Inc. ISBN 0-8311-3085-7 – via Google Books.
Bolton 2015, p. 15 Bolton, William (2015). Programmable Logic Controllers (6th, revised ed.). Newnes. ISBN 9780081003534 – via Google Books.

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Strothman, Jim (2003-08-01). "Leaders of the pack". ISA. Archived from the original on 2017-08-08. Retrieved 2020-02-24.
"A-B PLC Inventor, Dr. Odo Struger, Dies". Control Engineering. 1999-02-01. Archived from the original on 2020-02-24. Retrieved 2020-02-24.