GEOS (8-bit operating system)

This article is about the GEOS home computer operating system. For the PC/x86 based system, see GEOS (16-bit operating system).
GEOS
GEOS for the Commodore 64
GEOS for the Commodore 64. Mimicking Commodore's own OS core naming, Berkeley called GEOS' core a "kernal" (cf. kernel).
DeveloperBerkeley Softworks
(later GeoWorks)
Written inAssembly language
Working stateDiscontinued, historic
Initial release1986; 38 years ago (1986)
Latest releaseGEOS 2.0
Available inEnglish, German and Spanish[1][2]
PlatformsCommodore 64, Commodore 128, Plus/4, Apple II, MEGA65
Default
user interface		Graphical user interface
LicenseProprietary software

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 became available in 1987 for the Commodore 128 and in 1988 for the Apple II. A lesser-known version was also released for the Commodore Plus/4.

GEOS closely resembles early versions of the classic Mac OS and includes a graphical word processor (geoWrite) and paint program (geoPaint).

A December 1987 survey by the Commodore-dedicated magazine Compute!'s Gazette found that nearly half of respondents used GEOS.[3]: 4  For many years, Commodore bundled GEOS with its redesigned and cost-reduced C64, the C64C. At its peak, GEOS was the third-most-popular microcomputer operating system in the world in terms of units shipped, trailing only MS-DOS and Mac OS (besides the original Commodore 64's KERNAL).[citation needed]

Other GEOS-compatible software packages were available from Berkeley Softworks or from third parties, including a reasonably sophisticated desktop publishing application called geoPublish and a spreadsheet called geoCalc. While geoPublish is not as sophisticated as Aldus Pagemaker and geoCalc not as sophisticated as Microsoft Excel, the packages provide reasonable functionality, and Berkeley Softworks founder Brian Dougherty claimed the company ran its business using its own software on Commodore 8-bit computers for several years.

  1. ^ "GEOS en castellano".
  2. ^ "GEOS Drean Commodore version 1.2".
  3. ^ Elko, Lance (1 May 1988). "Editor's Notes". Compute!'s Gazette. Vol. 6, no. 59. ISSN 0737-3716. Retrieved 11 February 2021 – via Internet Archive.