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(jee -os) The first all-scientific satellite in geostationary orbit, built by the European Space Agency for the purpose of studying the Earth's magnetosphere. GEOS–1, launched in April 1977, failed to reach its planned orbit; GEOS–2 was successfully launched in July 1978 and operated for two years with the reactivated GEOS–1 and some other satellites. Having become redundant it was boosted into a higher orbit in 1984.


A small windowing, microkernel (less than 64 kbytes long) operating system written in heavily bummed assembly language for MS-DOS computers. It multitasks rather nicely on a 6 Mhz Intel 80286 with at least 512K memory.

It was adapted to PDAs by adding pen recognition, which doesn't work very well.

Usenet newsgroup: news:comp.os.geos.


(1) For GEO communications satellites, see GEO.

(2) (Graphic Environment Operating System) An earlier graphical user interface (GUI) and application platform from Breadbox Computer Company. Originally developed by Geoworks Corporation, GEOS was first available for the 8-bit Commodore 64 and Apple II in the mid-1980s.

In 1990, PC/GEOS was introduced for DOS-based PCs, and GEOS ran under various DOS versions in notebook computers and handhelds, including Brother's GeoBook and Nokia's Communicator. GEOS was also the first front end to AOL's website, and GEOS SC was a 32-bit version used by Mitsubishi for cellphones in Japan.

DOS-Based GEOS Suites
Breadbox Ensemble (formerly Geoworks Ensemble) included GEOS-based productivity apps and utilities. A School Suite included educational apps, and an Android tablet pre-loaded with GEOS School Suite was proposed.

GEOS was first licensed to Breadbox, Geoworks' largest application developer and training organization. Breadbox acquired the rights to GEOS software in 2003. See Commodore 64, Apple II and DOS.

Breadbox School Suite
School Suite included a raft of educational applications for the GEOS platform. (Image courtesy of Breadbox Computer Company.)
References in periodicals archive ?
For example, Biederman and others [1982] show that when a cylindrical object is placed in a kitchen it is more likely to be recognized as a breadbox rather than a drum.
Read the ingredient labels on everything in your kitchen cupboards, refrigerator, breadbox and everywhere else you stash food.
The Court found this fact irrelevant: "[W]hether the installation is a taking does not depend on whether the volume of space it occupies is bigger than a breadbox.
Size of a small breadbox, rusty as a fox with a heartshaped snout, his
If it is a success, many will benefit from Panera's thinking outside the box--outside the breadbox, that is.
Less well known are the movements and agenda of his killer: on April 23, 1967, Prisoner #416-J, convicted of armed robbery, escaped from the maximum-security Missouri State Penitentiary by hiding in a breadbox bound for a bakery delivery truck.
the TURBOLAB 80 is lightweight and shaped like a breadbox.
26) Visual context's function is that of guiding attention and facilitating recognition of objects within a scene; we are more likely to look for a breadbox than a drum when looking at the picture of a kitchen, which guides us to detect the breadbox much faster.
The French bread on Driskill Mountain was a leftover from the breadbox, and you can't count the cost of the gas nor the beer.
Even common catch phrases that hearken back to earlier times may be puzzling to younger readers: stuck in a groove, 98-pound weakling, drop a dime, bigger than a breadbox, or a tough row to hoe.
Centered on the rotary was a toy dump truck a little smaller than a breadbox.