Analysis of information sources in references of the Wikipedia article "IBM Db2" in English language version.
DB2 for MVS (later OS/390) in 1983
Db2 for z/OS is a relational database that you can use to maintain large volumes of data with a high level of availability, security, and performance.
IBM z/VSE V6.2 is capable as of December 1, 2017, when used in .... Db2 Server for VSE and VM and Db2 Server for VSE Client Edition
Since the introduction of DB2 in 1983, IBM ...[unreliable source?]
Since the 1970s, when IBM Research invented the Relational Model and the Structured Query Language (SQL), IBM has developed a complete family of RDBMS software. Development started on mainframe platforms such as Virtual Machine (VM), Virtual Storage Extended (VSE), and Multiple Virtual Storage (MVS). In 1983, DB2 for MVS Version 1 was born. "DB2" was used to indicate a shift from hierarchical databases, like the Information Management System (IMS) popular at the time, to the new relational databases.
relational data base management ... I.B.M.'s DB2
Since the introduction of DB2 in 1983, IBM ...[unreliable source?]
relational data base management ... I.B.M.'s DB2
Since the 1970s, when IBM Research invented the Relational Model and the Structured Query Language (SQL), IBM has developed a complete family of RDBMS software. Development started on mainframe platforms such as Virtual Machine (VM), Virtual Storage Extended (VSE), and Multiple Virtual Storage (MVS). In 1983, DB2 for MVS Version 1 was born. "DB2" was used to indicate a shift from hierarchical databases, like the Information Management System (IMS) popular at the time, to the new relational databases.
Db2 for z/OS is a relational database that you can use to maintain large volumes of data with a high level of availability, security, and performance.
IBM z/VSE V6.2 is capable as of December 1, 2017, when used in .... Db2 Server for VSE and VM and Db2 Server for VSE Client Edition