GEOS may refer to:

Computer software

GEOS (8-bit operating system) GEOS (''Graphic Environment Operating System'') is a discontinued operating system from Berkeley Softworks (later GeoWorks). Originally designed for the Commodore 64 with its version being released in 1986, enhanced versions of GEOS later beca ...

, an operating system originally designed for the Commodore 64 *

GEOS (16-bit operating system) 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 MS-DOS-based, I ...

, a DOS-based graphical user interface and x86 operating system * GEOS (securities processing software), an integrated online system for the management and processing of securities *

GEOS (software library) JTS Topology Suite (Java Topology Suite) is an open-source Java software library that provides an object model for Euclidean planar linear geometry together with a set of fundamental geometric functions. JTS is primarily intended to be used as ...

, an open-source geometry engine * Goddard Earth Observing System, an Earth system model

Other

GEOS (eikaiwa) was one of the Big Four private ''eikaiwa'', or English conversation teaching companies, in Japan. Its extensive network of overseas schools made it the world's largest language school chain. The firm went into bankruptcy in Japan on April 20 ...

, an English conversation teaching company based in Japan *

GEOS circle In geometry, the GEOS circle is derived from the intersection of four lines that are associated with a generalized triangle: the Euler line, the Soddy line, the orthic axis and the Gergonne line. Note that the Euler line is orthogonal to the or ...

, an intersection of four lines that are associated with a generalized triangle *

GEOS (satellite) The European Space Research Organisation (ESRO) was an international organisation founded by 10 European nations with the intention of jointly pursuing scientific research in space. It was founded in 1964. As an organisation ESRO was based on a ...

, a research satellite from ESRO (1978–1982) * GEOS (satellite series), three research satellites from NASA *

Groupe GEOS GEOS is an international corporation based in France. The core activity of the group is risk management. Chronology Establishment GEOS was set up in 1997. The ambition of the group’s founders, Stéphane Gérardin and Thierry Laulom, was to ...

, a French business consultancy {{disambiguation