The three eras of database systems starts with a client-server Postgres, but missed the daddy of the generation before that - xBase (ie dBase, FoxPro etc).

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khaledh 3 days ago | parent [-]

It goes way before that. It starts with IDS (Integrated Data Store) from GE (1964), which was a network database system. Next was IBM's hierarchical database system IMS (Information Management System, 1966), still in use today. Then the CODASYL model (late 1960s), which was an effort to standardize the network model. And then Codd came up with the relational model in the early 70s, upon which an explosion of database systems were built (first is IBM System R, SQL, Oracle, DB2, Ingres). Then came the PC-based database systems you mentioned.

	▲	4ndrewl 3 days ago \| parent [-]
		Oh for sure. To suggest we're only on generation 3 of "databases" is way off the mark.