IBM also had its own DBMS in 1966, known as Information Management System (IMS). IMS was a development of software written for the Apollo program on the System/360. IMS was generally similar in concept to CODASYL, but used a strict hierarchy for its model of data navigation instead of CODASYL's network model. Both concepts later became known as navigational databases due to the way data was accessed: the term was popularized by Bachman's 1973 Turing Award presentation The Programmer as Navigator. IMS is classified by IBM as a hierarchical database. IDMS and Cincom Systems' TOTAL databases are classified as network databases. IMS remains in use .
IBM also had its own DBMS in 1966 known as Information Management System (IMS) IMS was a development of software written for the Apollo program on the System/360 IMS was generally similar in concept to CODASYL but used a strict hierarchy for its model of data navigation instead of CODASYL's network model Both concepts later became known as navigational databases due to the way data was accessed the term was popularized by Bachman's 1973 Turing Award presentation The Programmer as Navigator IMS is classified by IBM as a hierarchical database IDMS and Cincom Systems' TOTAL databases are classified as network databases IMS remains in use 