- The development of a structured query language called SQL, which has since become the standard language for relational systems.
- The production of various commercial relational DBMS products during the 1980s, for example DB2 from IBM and ORACLE from ORACLE Corporation.
In 1979, dBase-II was developed by Ashton-Tare and it was called as relational DBMS. It was very popular in PCs. It was not a truly relational DBMS product. In face, it was a programming language with generalized file-processing capabilities.