OS/2: Difference between revisions

OS/2 (edit)

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'''OS/2'''('''Operating System/2''') was an operating system originally developed jointly by [[Microsoft]] and IBM, in development was codenamed "CP/DOS". Between the release of [[Windows 3.0]] and [[OS/2 1.3]], Microsoft stopped all cooperation with IBM, due to a feud between the companies' significantly different cultures and visions. IBM later on handled the development of the operating system by itself.  
'''OS/2''' ('''Operating System/2''') is an operating system originally developed jointly by [[w:IBM|IBM]] and [[w:Microsoft|Microsoft]] as an advanced successor to [[MS-DOS|DOS]] which added support for protected mode and preemptive multitasking. The [[OS/2 1.0|first version]] was released in 1987, although it only supported a command line interface. [[OS/2 1.1]], released a year after in 1988 notably introduced the Presentation Manager, a graphical user interface partially developed in tandem with the contemporary [[Windows 2.x]]. However, despite the similarities, there were some key differences between Windows and the Presentation Manager that made it practically impossible to write an application for one platform and then recompile the source code for the other without large changes.


OS/2 have features like a virtual DOS machine, the WinOS/2 subsystem (Windows 3.0/3.1x inside OS/2), Presentation Manager, and more.  
After Microsoft broke up with IBM following the success of [[Windows 3.0]], the latter continued development of OS/2 on its own. [[OS/2 2.0]], released in 1992, introduced support for 32-bit applications, removed almost all Microsoft-written code and introduced a new shell called the Workplace Manager. The new version also included improvements to DOS compatibility, as users were now able to run multiple DOS applications at once via the MVDN (Multiple Virtual DOS Machines). This in turn was used to build Win-OS/2, a subsystem which ran a modified version of Windows 3.0 (later updated to [[Windows 3.1]]) on top of MVDM and provided integration between Windows and OS/2 apps. IBM leveraged this in their marketing campaign, which promoted OS/2 as ''"a better DOS than DOS, a better Windows than Windows"''.


Microsoft later used OS/2 code to develop [[Windows NT 3.1]]. OS/2 code was later used by Serenity Systems to develop [[eComStation]] in 2001, which in turn was used by Arca Noae LLC to develop ArcaOS in 2017.


==Timeline==
==Timeline==
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