GemStone/S is computer software, an application framework that was first available for the programming language Smalltalk as an object database.

GemStone Systems was founded on March 1, 1982, as Servio Logic, to build a database machine based on a set theory model.

Three of the original cofounding engineers, Bob Bretl, Allen Otis, and Monty Williams (now retired), have been with the firm since its start.

[citation needed] Many information system features now associated with Java EE were implemented earlier in GemStone.

GemStone is an advanced Smalltalk platform for developing, deploying, and managing scalable, high-performance, multi-tier applications based on business objects.