GEOS is a computer operating environment, graphical user interface, and suite of application software. Originally released as PC/GEOS, it runs on DOS-based, IBM PC compatible computers. The package later became GeoWorks Ensemble, then NewDeal Office, and is now Breadbox Ensemble. Versions for some handheld platforms were also released.PC/GEOS was first created by Berkeley Softworks, who later became GeoWorks Corporation.