Databases

Database management systems emerged in the 1960s to address the problem of storing and retrieving large amounts of data accurately and quickly.

One of the earliest such systems was IBM's Information Management System (IMS),which is still widely deployed more than 40 years later.

IMS stores data hierarchically, but in the 1970s Ted Codd proposed an alternative relational storage model based on set theory and predicate logic and the familiar concepts of tables, rows and columns. The first commercially available relational database management system (RDBMS) was available from Oracle in 1980.

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