GEOS (16-bit operating system)

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PC/GEOS

A screenshot of Breadbox Ensemble 4.1.2
Developer	Berkeley Softworks
Written in	Assembly, C
Working state	Supported
Source model	Open source, formerly closed source
Initial release	1990; 34 years ago (1990)
Latest release	4.1.3 / 25 August 2009; 14 years ago (2009-08-25)
Repository	github.com/bluewaysw
Influenced by	GEOS (8-bit)
Default user interface	Motif or "Win95 clone"
License	Apache
Official website	blog.bluewaysw.de

GEOS (later renamed GeoWorks Ensemble, NewDeal Office, and Breadbox Ensemble) is a computer operating environment, graphical user interface (GUI), and suite of application software. Originally released as PC/GEOS, it runs on DOS-based, IBM PC compatible computers. Versions for some handheld platforms were also released and licensed to some companies.^[1]

PC/GEOS was first created by Berkeley Softworks, which later became GeoWorks Corporation. Version 4.0 was developed in 2001 by Breadbox Computer Company, limited liability company (LLC), and was renamed Breadbox Ensemble. In 2015, Frank Fischer, the CEO of Breadbox, died and efforts on the operating system stopped until later in 2017 when it was bought by blueway.Softworks.^[2][3]

PC/GEOS should not be confused with the 8-bit GEOS product from the same company, which runs on the Commodore 64 and Apple II.