GEOS (later renamed GeoWorks Ensemble, NewDeal Office, and Breadbox Ensemble) is a computer
operating environment
In computer software, an operating environment or integrated applications environment is the environment in which users run application software. The environment consists of a user interface provided by an applications manager and usually an app ...
,
graphical user interface
The GUI ( "UI" by itself is still usually pronounced . or ), graphical user interface, is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, inste ...
(GUI), and suite of
application software
Application may refer to:
Mathematics and computing
* Application software, computer software designed to help the user to perform specific tasks
** Application layer, an abstraction layer that specifies protocols and interface methods used in a c ...
. Originally released as PC/GEOS, it runs on
DOS
DOS is shorthand for the MS-DOS and IBM PC DOS family of operating systems.
DOS may also refer to:
Computing
* Data over signalling (DoS), multiplexing data onto a signalling channel
* Denial-of-service attack (DoS), an attack on a communicat ...
-based,
IBM PC compatible
IBM PC compatible computers are similar to the original IBM PC, XT, and AT, all from computer giant IBM, that are able to use the same software and expansion cards. Such computers were referred to as PC clones, IBM clones or IBM PC clones. ...
computers. Versions for some handheld platforms were also released and licensed to some companies.
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
A limited liability company (LLC for short) is the US-specific form of a private limited company. It is a business structure that can combine the pass-through taxation of a partnership or sole proprietorship with the limited liability of a ...
(LLC), and was renamed Breadbox Ensemble. In 2015, Frank Fischer, the CEO of Breadbox, died and efforts on the
operating system
An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs.
Time-sharing operating systems schedule tasks for efficient use of the system and may also in ...
stopped until later in 2017 when it was
bought by blueway.Softworks.
PC/GEOS should not be confused with the
8-bit GEOS product from the same company, which runs on the
Commodore 64
The Commodore 64, also known as the C64, is an 8-bit home computer introduced in January 1982 by Commodore International (first shown at the Consumer Electronics Show, January 7–10, 1982, in Las Vegas). It has been listed in the Guinness ...
and
Apple II
The Apple II (stylized as ) is an 8-bit home computer and one of the world's first highly successful mass-produced microcomputer products. It was designed primarily by Steve Wozniak; Jerry Manock developed the design of Apple II's foam-m ...
.
PC/GEOS
GeoWorks Ensemble
In 1990, GeoWorks released PC/GEOS for
IBM PC compatible
IBM PC compatible computers are similar to the original IBM PC, XT, and AT, all from computer giant IBM, that are able to use the same software and expansion cards. Such computers were referred to as PC clones, IBM clones or IBM PC clones. ...
systems. Commonly referred to as ''GeoWorks Ensemble'', it was incompatible with the earlier
8-bit versions of GEOS for
Commodore
Commodore may refer to:
Ranks
* Commodore (rank), a naval rank
** Commodore (Royal Navy), in the United Kingdom
** Commodore (United States)
** Commodore (Canada)
** Commodore (Finland)
** Commodore (Germany) or ''Kommodore''
* Air commodore, a ...
and
Apple II
The Apple II (stylized as ) is an 8-bit home computer and one of the world's first highly successful mass-produced microcomputer products. It was designed primarily by Steve Wozniak; Jerry Manock developed the design of Apple II's foam-m ...
computers, but provided numerous enhancements, including scalable fonts and multitasking on
IBM PC XT
The IBM Personal Computer XT (model 5160, often shortened to PC/XT) is the second computer in the IBM Personal Computer line, released on March 8, 1983. Except for the addition of a built-in hard drive and extra expansion slots, it is very simila ...
- and
AT-class PC clones. GeoWorks saw a market opportunity to provide a graphical user interface for the 16 million older model PCs that were unable to run Microsoft Windows 2.x.
GEOS was packaged with a suite of productivity applications. Each had a name prefixed by "Geo": GeoWrite, GeoDraw; GeoManager; GeoPlanner; GeoDex, and GeoComm. It was also bundled with many PCs at the time, but like other GUI environments for the PC platform, such as
Graphics Environment Manager
GEM (for Graphics Environment Manager) is an operating environment released by Digital Research (DRI) in 1985 for use with the DOS operating system on Intel 8088 and Motorola 68000 microprocessors.
GEM is known primarily as the graphical user ...
(GEM), it ultimately proved less successful in the marketplace than Windows. Former CEO of GeoWorks claims that GEOS faded away "because Microsoft threatened to withdraw supply of
MS-DOS
MS-DOS ( ; acronym for Microsoft Disk Operating System, also known as Microsoft DOS) is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PC DOS, and a few ope ...
to hardware manufacturers who bundled Geoworks with their machines".
In December 1992,
NEC
is a Japanese multinational corporation, multinational information technology and electronics corporation, headquartered in Minato, Tokyo. The company was known as the Nippon Electric Company, Limited, before rebranding in 1983 as NEC. It prov ...
and
Sony
, commonly stylized as SONY, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. As a major technology company, it operates as one of the world's largest manufacturers of consumer and professional ...
bundled an
original equipment manufacturer
An original equipment manufacturer (OEM) is generally perceived as a company that produces non-aftermarket parts and equipment that may be marketed by another manufacturer. It is a common industry term recognized and used by many professional or ...
(OEM) version of GeoWorks named the CD Manager with their respective CD-ROM players that sold as retail box add-on peripherals for consumers. The NEC Bundle retailed for around $500.00 with a 1x external
CD-ROM
A CD-ROM (, compact disc read-only memory) is a type of read-only memory consisting of a pre-pressed optical compact disc that contains data. Computers can read—but not write or erase—CD-ROMs. Some CDs, called enhanced CDs, hold both comput ...
, ''Small Computer System Interface'' (
SCSI
Small Computer System Interface (SCSI, ) is a set of standards for physically connecting and transferring data between computers and peripheral devices. The SCSI standards define commands, protocols, electrical, optical and logical interface ...
) interface controller, Labtec CD-150 amplified stereo speakers and 10 software titles.
A scaled-down version of GeoWorks was used by
America Online
AOL (stylized as Aol., formerly a company known as AOL Inc. and originally known as America Online) is an American web portal and online service provider based in New York City. It is a brand marketed by the current incarnation of Yahoo! Inc. ...
for their DOS-based AOL client software from the time of introduction on IBM compatible PCs until the late 1990s when America Online dropped development for graphical DOS in favor of Microsoft Windows. During that time, the popular single 3.5"
self-booting disk that AOL was distributing could be hacked to
boot
A boot is a type of footwear. Most boots mainly cover the foot and the ankle, while some also cover some part of the lower calf. Some boots extend up the leg, sometimes as far as the knee or even the hip. Most boots have a heel that is cle ...
the GeoWorks environment.
IBM released the PC/GEOS-based
EduQuest SchoolView network management tool for K-12 schools in 1994. Negotiations to make PC/GEOS an integral part of
PC DOS 7.0 failed.
GeoWorks attempted to get third-party developers but was unable to get much support due to expense of the developer kit, which cost $1,000 for the manuals only, and the difficult programming environment, which required a second PC networked via serial port to run the debugger.
Even though PC/GEOS is referred to as an "operating system", it still requires DOS in load. GEOS and its applications were written in a mix of 8086
assembly language
In computer programming, assembly language (or assembler language, or symbolic machine code), often referred to simply as Assembly and commonly abbreviated as ASM or asm, is any low-level programming language with a very strong correspondence be ...
(Espire), an interpreted language called
IZL
Irgun • Etzel
, image = Irgun.svg , image_size = 200px
, caption = Irgun emblem. The map shows both Mandatory Palestine and the Emirate of Transjordan, which the Irgun claimed in its entirety for a future Jewish state. The acronym "Etzel" i ...
, and
C (GEOS Object C: GOC) with non-standard language extensions to support the
object-oriented
Object-oriented programming (OOP) is a programming paradigm based on the concept of "objects", which can contain data and code. The data is in the form of fields (often known as attributes or ''properties''), and the code is in the form of pro ...
design.
Under
DR DOS 6.0
DR-DOS (written as DR DOS, without a hyphen, in versions up to and including 6.0) is a disk operating system for IBM PC compatibles. Upon its introduction in 1988, it was the first DOS attempting to be compatible with IBM PC DOS and MS-D ...
, if TASKMAX was loaded before PC/GEOS, PC/GEOS registered as graphical menu system for TASKMAX.
This still worked under the pre-emptive multitasker (
EMM386
EMM386 is the expanded memory manager of Microsoft's MS-DOS, IBM's PC DOS, Digital Research's DR-DOS, and Datalight's ROM-DOS which is used to create expanded memory using extended memory on Intel 80386 CPUs. There also is an EMM386.EXE available ...
/MULTI + TASKMGR) provided by
Novell DOS 7
DR-DOS (written as DR DOS, without a hyphen, in versions up to and including 6.0) is a disk operating system for IBM PC compatibles. Upon its introduction in 1988, it was the first DOS attempting to be compatible with IBM PC DOS and MS-D ...
,
OpenDOS 7.01
DR-DOS (written as DR DOS, without a hyphen, in versions up to and including 6.0) is a disk operating system for IBM PC compatibles. Upon its introduction in 1988, it was the first DOS attempting to be compatible with IBM PC DOS and MS-D ...
and
DR-DOS 7.02
DR-DOS (written as DR DOS, without a hyphen, in versions up to and including 6.0) is a disk operating system for IBM PC compatibles. Upon its introduction in 1988, it was the first DOS attempting to be compatible with IBM PC DOS and MS-D ...
(and higher), allowing for multiple GEOS and DOS applications to run concurrently.
[ (NB. NWDOSTIP.TXT is a comprehensive work on ]Novell DOS 7
DR-DOS (written as DR DOS, without a hyphen, in versions up to and including 6.0) is a disk operating system for IBM PC compatibles. Upon its introduction in 1988, it was the first DOS attempting to be compatible with IBM PC DOS and MS-D ...
and OpenDOS 7.01
DR-DOS (written as DR DOS, without a hyphen, in versions up to and including 6.0) is a disk operating system for IBM PC compatibles. Upon its introduction in 1988, it was the first DOS attempting to be compatible with IBM PC DOS and MS-D ...
, including the description of many undocumented features and internals. It is part of the author's yet larger MPDOSTIP.ZIP
collection maintained up to 2001 and distributed on many sites at the time. The provided link points to a HTML-converted older version of the NWDOSTIP.TXT
file.)
After release of Ensemble 2.01, GeoWorks ended support for the desktop version to focus on handhelds and smart devices.
Geoworks Ensemble won the 1991
Software Publishers Association
The Software and Information Industry Association (SIIA) is a trade association dedicated to the entertainment, consumer and business software industries. Established in 1984 as the Software Publishers Association (SPA), the SIIA took its new na ...
Excellence in Software Award for Best Consumer Program.
NewDeal Office
A newer version of PC/GEOS was marketed in the late 1990s as ''NewDeal Office'' from NewDeal Inc. in hopes of creating a market among owners of
i386
The Intel 386, originally released as 80386 and later renamed i386, is a 32-bit microprocessor introduced in 1985. The first versions had 275,000 transistors[i486
The Intel 486, officially named i486 and also known as 80486, is a microprocessor. It is a higher-performance follow-up to the Intel 386. The i486 was introduced in 1989. It represents the fourth generation of binary compatible CPUs following the ...]
and
Pentium
Pentium is a brand used for a series of x86 architecture-compatible microprocessors produced by Intel. The original Pentium processor from which the brand took its name was first released on March 22, 1993. After that, the Pentium II and Pe ...
PCs that could not run
Windows 95
Windows 95 is a consumer-oriented operating system developed by Microsoft as part of its Windows 9x family of operating systems. The first operating system in the 9x family, it is the successor to Windows 3.1x, and was released to manufacturin ...
or
Windows 98
Windows 98 is a consumer-oriented operating system developed by Microsoft as part of its Windows 9x family of Microsoft Windows operating systems. The second operating system in the 9x line, it is the successor to Windows 95, and was released to ...
effectively. NewDeal released 3 new versions of NewDeal Office (NewDeal Office 2.5, NewDeal Office 3/98 and NewDeal Office 2000) until it went bankrupt in 2000.
NDO or NDO 2000 came with a webbrowser named Skipper or Skipper 2000, respectively.
Breadbox Ensemble
After "NewDeal Inc." went out of business, Breadbox purchased the rights in the software from GeoWorks in 2001. Their newest PC/GEOS, 4.x, is now a full productivity and internet suite, including web browser (named WebMagick) as well as email. Other essential programs such as word processing, spreadsheet, flat file database and graphics applications are integrated into this package.
On 14 November 2015, Frank S. Fischer, the CEO and owner of Breadbox Ensemble LLC, died of a heart attack, some while after announcing plans to bring GEOS to Android.
Versions
* 1990: OS/90 beta version
* 1990: geoDOS beta version
* 1990: GeoWorks 1.0
* 1991: GeoWorks 1.2
* 1992: GeoWorks 1.2 Pro (with
Borland
Borland Software Corporation was a computer technology company founded in 1983 by Niels Jensen, Ole Henriksen, Mogens Glad and Philippe Kahn. Its main business was the development and sale of software development and software deployment product ...
Quattro Pro
Quattro Pro is a spreadsheet program developed by Borland and now sold by Corel, most often as part of Corel's WordPerfect Office suite.
Characteristics
Historically, Quattro Pro used keyboard commands close to those of Lotus 1-2-3. While it ...
for DOS with PC/GEOS "Look and Feel")
* 1992: GeoWorks DTP
* 1992: GeoWorks CD Manager
* 1993: GeoWorks Ensemble 2.0 (new kernel PC/GEOS 2.0)
* 1993: Geopublish 2.0
* 1994: Geoworks Ensemble 2.01
* 1996: NewDeal Office 2.2
* 1996: NewDeal Office 2.5
* 1996: NewDeal Publish 2.5
shareware
Shareware is a type of proprietary software that is initially shared by the owner for trial use at little or no cost. Often the software has limited functionality or incomplete documentation until the user sends payment to the software developer ...
version
* 1997: NewDeal Office 97
* 1998: NewDeal Office 98
* 1999: NewDeal Office release 3 (new kernel PC/GEOS 3.0)
* 1999: NewDeal Office release 3 evaluation
* 1999: NewDeal Office 3.2
* 2000: NewDeal Office 3.2d (German patch)
* 2000: NewDeal Office 2000 (new kernel PC/GEOS 4.0)
* 2000: NewDeal Office 2000 for (for a Surf´n´Office PC from
Ted Turner IV (
MyTurn, Inc.) with help from
CNN
CNN (Cable News Network) is a multinational cable news channel headquartered in Atlanta, Georgia, U.S. Founded in 1980 by American media proprietor Ted Turner and Reese Schonfeld as a 24-hour cable news channel, and presently owned by the M ...
)
* 2001: BreadBox Ensemble beta version 4.0.1.1
* 2001: BreadBox Ensemble beta version 4.0.1.x
* 2002: Breadbox Ensemble beta version 4.0.2.0
* 2005–March: Breadbox Ensemble version 4.1.0.0
* 2005–November: Breadbox Ensemble version 4.1.2.0
* 2009–August: Breadbox Ensemble version 4.1.3.0
PEN/GEOS
PEN/GEOS 1.0 was the new name for PC/GEOS 2.0 when GeoWorks released it on 9 April 1992. PEN/GEOS 1.0 was a pioneering
personal digital assistant
A personal digital assistant (PDA), also known as a handheld PC, is a variety mobile device which functions as a personal information manager. PDAs have been mostly displaced by the widespread adoption of highly capable smartphones, in partic ...
(PDA) technology.
GEOS was also used in the low-end GeoBook
laptop
A laptop, laptop computer, or notebook computer is a small, portable personal computer (PC) with a screen and alphanumeric keyboard. Laptops typically have a clam shell form factor with the screen mounted on the inside of the upper li ...
from
Brother Industries
is a Japanese multinational corporation, multinational electronics and electrical equipment company headquartered in Nagoya, Japan. Its products include Printer (computing), printers, multifunction printers, desktop computers, sewing machin ...
and in several
Nokia Communicator
The Nokia Communicator is a brand name for a series of business-optimized smartphones marketed by Nokia Corporation, all of which appear as normal (if large) phones on the outside, and open in clamshell format to access a QWERTY keyboard and an ...
models (GEOS 3.0 in models
9000, 9110). PEN/GEOS 2.0 was released in 1992, and version 3.0 was released in 1995.
''Zoomer'' devices; Tandy Z-PDA, AST GRiDPad 2390, Casio Z-7000 & XL 7000
PEN/GEOS 1.0 was used as the operating system for the
Tandy Corporation
Tandy Corporation was an American family-owned leather goods company based in Fort Worth, Texas, United States. Tandy Leather was founded in 1919 as a leather supply store. By the end of the 1950s, under the tutelage of then-CEO Charles Tandy, ...
Z-PDA, which was introduced shortly after the first
Apple Newton MessagePad.
Palm Computing
Palm, Inc. was an American company that specialized in manufacturing personal digital assistants (PDAs) and various other electronics. They were the designer of the PalmPilot, the first PDA successfully marketed worldwide, as well as the Treo 60 ...
had been incorporated to create software for this device and shipped its first handwriting recognition software, PalmPrint,
personal information manager
A personal information manager (often referred to as a PIM tool or, more simply, a PIM) is a type of application software that functions as a personal organizer. The acronym PIM is now, more commonly, used in reference to personal information manag ...
, Palm Organizer, and synchronization software, PalmConnect,
on the Z-PDA. Palm Organizer included the PalmSchedule date book, PalmAddress address book, PalmNotes notebook, a dictionary, calculator, clock, forms calculator, 26 language translation dictionary, on-line help, holiday, and travel information. The device was also sold under license as the AST GRiDPad 2390 and as the Casio Z-7000 which was the best selling version. In the US, Casio sold it under the name XL-7000 without the multi-lingual interface, but added an AOL client and some USA specific help files. These devices were all named ''Zoomer'' and were the first PDAs with a connection to the online services
CompuServe
CompuServe (CompuServe Information Service, also known by its initialism CIS) was an American online service provider, the first major commercial one in the world – described in 1994 as "the oldest of the Big Three information services (the oth ...
and
AOL
AOL (stylized as Aol., formerly a company known as AOL Inc. and originally known as America Online) is an American web portal and online service provider based in New York City. It is a brand marketed by the current incarnation of Yahoo (2017â ...
. This was made possible through the pre-installed dial-up software CompuServeAOL.
HP OmniGo 100 & 120
In 1993, GeoWorks released PEN/GEOS 2.0, again based on PC/GEOS 2.0. In 1995, this version of GEOS appeared (running on top of DOS) on the
HP OmniGo 100
The HP 200LX Palmtop PC (F1060A, F1061A, F1216A), also known as project ''Felix'', is a personal digital assistant introduced by Hewlett-Packard in August 1994. It was often called a Palmtop PC, and it was notable that it was, with some mi ...
. It featured
Graffiti
Graffiti (plural; singular ''graffiti'' or ''graffito'', the latter rarely used except in archeology) is art that is written, painted or drawn on a wall or other surface, usually without permission and within public view. Graffiti ranges from s ...
handwriting recognition. The OmniGo is a flip-around clamshell handheld computer powered by a
Vadem VG230 integrated PC-on-a-chip. The VG230 chip includes an
Intel 80186
The Intel 80186, also known as the iAPX 186, or just 186, is a microprocessor and microcontroller introduced in 1982. It was based on the Intel 8086 and, like it, had a 16-bit external data bus multiplexed with a 20-bit address bus. The 801 ...
-instruction set compatible
NEC V30
The NEC V20 is a microprocessor that was designed and produced by NEC. It is both pin compatible and object code compatible with the Intel 8088, with an instruction set architecture (ISA) similar to that of the Intel 80188 with some extensio ...
core. It was soon followed by the
HP OmniGo 120
The HP 200LX Palmtop PC (F1060A, F1061A, F1216A), also known as project ''Felix'', is a personal digital assistant introduced by Hewlett-Packard in August 1994. It was often called a Palmtop PC, and it was notable that it was, with some m ...
, which added a high-contrast screen.
Brother LW-Writing System
Brother
A brother is a man or boy who shares one or more parents with another; a male sibling. The female counterpart is a sister. Although the term typically refers to a familial relationship, it is sometimes used endearingly to refer to non-familia ...
LW-screen typewriters use PEN/GEOS and are the only version of the operating system that ships with vendor-provided drivers for scanner and it included a GEOS scanning application. In Germany, the Brother LW750ic system is equipped with PEN/GEOS.
Brother GeoBook
In 1997, Brother, in collaboration with IBM, brought the GeoBook series of notebooks to market. GeoBook models NB-60, NB-80C, and PN-9100GR used a modified version of PEN/GEOS using the Yago user interface. The GeoBook series was marketed mainly in education and was part of the ''IBM Eduquest School View'' strategy.
Nokia Communicator 9000(i) and 9110(i)
In 1996, the
Nokia 9000 Communicator
The Nokia 9000 Communicator was the first product in Nokia's Communicator series, announced at CeBIT 1996 and introduced into the market on 15 August 1996. The phone was large and heavy at but powerful at the time. It is powered by an Intel 24&n ...
smartphone was introduced. This phone uses PEN/GEOS 3.0 and established the smartphone market. Nokia followed with Communicator models 9000i, 9110, and 9110i.
GEOS-SC
GEOS-SC was a 32-bit
reduced instruction set computer
In computer engineering, a reduced instruction set computer (RISC) is a computer designed to simplify the individual instructions given to the computer to accomplish tasks. Compared to the instructions given to a complex instruction set comput ...
(RISC) CPU
smartphone
A smartphone is a portable computer device that combines mobile telephone and computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, whic ...
, OS, and GUI for the Japanese cellphone market. It was released in 1997. Originally built as GeoWorks' planned future OS and codenamed 'Liberty', GEOS-SC became the basis for cellphones designed by
Mitsubishi Electric
, established on 15 January 1921, is a Japanese multinational electronics and electrical equipment manufacturing company headquartered in Tokyo, Japan. It is one of the core companies of Mitsubishi. The products from MELCO include elevators an ...
Company (MELCO) of Japan.
GEOS-SE
Alongside this, GEOS-SE which was an OS designed and developed by Eden Ltd., a UK-based company acquired in 1997 by Geoworks. It became the basis of several other devices, most notably the Seiko Epson Locatio which was a multifunction device incorporating browser, PIM software, phone, GPS and Camera. It was launched in Japan in 1998.
FreeGEOS
Since 2016, the
source code
In computing, source code, or simply code, is any collection of code, with or without comments, written using a human-readable programming language, usually as plain text. The source code of a program is specially designed to facilitate the wo ...
of PC/GEOS has been made available as FreeGEOS and can be
compiled
In computing, a compiler is a computer program that translates computer code written in one programming language (the ''source'' language) into another language (the ''target'' language). The name "compiler" is primarily used for programs that ...
and edited freely.
References
Further reading
* GEOWORKS. (1990). "Product Packaging (a printed card box with corrugated card liner) Part number: 16-2001-0101 Bar Code: 0 14233 20010 6". GeoWorks, Berkeley, CA 94704.
* Oerttel, Burkhard. ''Das große Buch zu GeoWorks Pro, Ensemble & DTP'', Data Becker GmbH, 1992, .
* Oerttel, Burkhard. ''Das große Buch zu GeoWorks 2.0'', Data Becker GmbH, 1994, .
* Wegen, Andreas. ''GeoWorks DTP, Pro, Ensemble'', te-wi Verlag bzw. TLC The Learning Companie, Series: Grundlagen und Praxis - Betriebssysteme, 1992, .
* Wegen, Andreas. ''GeoWorks 2.0 - Bedienung, Applikationen, Beispiele, Tips, Interna, Referenz'', te-wi Verlag, 1993, .
* Seibert, Axel. ''GeoWorks - Ensemble Erfolgreich starten - sicher nutzen'', Markt & Technik Verlag München, Series: Workshop - PC, 1991, .
* Roßkamp, Alfred. ''GeoWorks Ensemble - Einführung in die Benutzerschnittstelle'', Deutscher Taschenbuch Verlag (dtv), Series: Beck EDV-Berater im dtv (Basiswissen - GeoWorks), 1993, .
* Bartel, Rainer. ''GeoWorks 1.2 & Pro - Der Einstieg in 20 Schritten'', Sybex Verlag Düsseldorf, Series: Quick Start, 1992, .
* Schölles, Reiner. ''GeoWorks 2.0 - Schnellanleitung'', Data Becker GmbH, 1994, .
*
External links
* Usenet
**
**
Breadbox Computer Company former developer and publisher of GEOS
GEOS FAQGEOS-InfoBase*
* blueway.Softworks
{{DEFAULTSORT:Geos (16-Bit Operating System)
DOS software
Formerly proprietary software
Graphical user interfaces
Mobile operating systems
Operating system APIs
Software using the Apache license
Assembly language software
Window-based operating systems
X86 operating systems
1990 software
cs:GEOS