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The Information Management System (IMS) Program Product
October-December 2009 (vol. 31 no. 4)
pp. 66-75

The Information Management System (IMS) was one of the first program products offered by IBM. From its inception in a North American Rockwell and IBM joint study in the 1960s, the product has evolved into the preeminent transaction processing database management system (DBMS). Throughout its history, IMS has remained the leader in DBMS technology.

1. , IBM had four categories of programs in the 1960s. Type I programs were operating systems, languages, and utilities produced by the product divisions. Type II programs were developed and supported by the marketing division. Type III programs were developed by IBM system engineers. Type IV programs were developed by customers, who contributed them to IBM libraries for distribution. These programs were bundled with IBM computers, i.e., available at no extra cost to IBM hardware users.
2. B. Grad, "A Personal Recollection: IBM's Unbundling of Software and Services," IEEE Annals of the History of Computing, vol. 24, no. 1, 2002, pp. 64–71.
3. W.P. Grafton, "IMS: Past, Present, Future," Datamation, Sept. 1983.
4. From SHARE Session 1226 presentation, 26 Feb. 1998.
5. D. Meltz et al., An Introduction to IMS, IBM Press, 2005.

Index Terms:
IBM, Information Management System, IMS, DBMS, transaction processing, SHARE, program products
Citation:
William C. McGee, "The Information Management System (IMS) Program Product," IEEE Annals of the History of Computing, vol. 31, no. 4, pp. 66-75, Oct.-Dec. 2009, doi:10.1109/MAHC.2009.126
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