`Postgres  After returning to Berkeley, Stonebraker started a post-Ingres project to address the problems with the relational database model that had become increasing clear during the early 1980s. Primary among these was the relational model's inability to understand ``types``, combination of simpler data that make up a single unit. Today we typically refer to these as objects.   ``...the problems with the relational database model`` - I do not believe this was the case, there was no problem other than ignorance of the fundamentals.  ``Primary among these was the relational model's inability to understand ``types``...`` - complete rubbish, should be removed.  Replace with this para:   == Postgres ==   After returning to Berkeley, Stonebraker started a post-Ingres project to address limitations of existing database management implementations.`