Charles William Bachman III (December 11, 1924 – July 13, 2017) was an American computer scientist, who spent his entire career as an industrial researcher, developer, and manager rather than in academia.

In World War II he joined the United States Army and spent March 1944 through February 1946 in the South West Pacific Theater serving in the Anti-Aircraft Artillery Corps in New Guinea, Australia, and the Philippine Islands.

[2] After his discharge in 1946 he attended Michigan State College and graduated in 1948 with a bachelor's degree in mechanical engineering, where he was a member of Tau Beta Pi.

Working for customer Weyerhaeuser Lumber, he developed the first multiprogramming network access to the IDS database, an early online transaction processing system called WEYCOS in 1965.

In 1970, GE sold its computer business to Honeywell Information Systems, so he and his family moved from Phoenix, Arizona to Lexington, Massachusetts.

[6] In 1981, he joined a smaller firm, Cullinane Information Systems (later Cullinet), which offered a version of IDS that was called IDMS and supported IBM mainframes.

It was featured in IBM's Reengineering Cycle marketing program,[citation needed] combining: In 1991 Bachman Information Systems had their initial public offering, trading on the NASDAQ with the symbol BACH.