IBM Information Management System

Initial release	1966; 59 years ago (1966)
Stable release	15 / October 3, 2017; 7 years ago (2017-10-03)
Operating system	z/OS V2.2 or later
Platform	IBM System z
Type	Database & transaction processing subsystem
License	Proprietary
Website	www.ibm.com/software/data/ims/index.html

The IBM Information Management System (IMS) is a joint hierarchical database and information management system that supports transaction processing.^[1] Development began in 1966 to keep track of the bill of materials for the Saturn V rocket of the Apollo program, and the first version on the IBM System/360 Model 65 was completed in 1967 as ICS/DL/I and officially installed in August 1968.

IBM rebranded it IMS/360 in 1969, and ported it to new platforms as they emerged. In 1988, the company claimed that there were 7,000 IMS sites active worldwide. and went on to see extensive use and continual improvement to this day. IMS's most successful year in terms of sales was in 2003, 35 years after it was released. It was in use by over 95% of the Fortune 1000.^[2]