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Microsoft's first ever Operating System license was purchased from Seattle Computer Products for $25,000.
Source: https://www.computerhope.com/history/dos.htm -
A Timeline of advancements in Windows OS
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The Operating System that Microsoft had purchased from Seattle Computer Products; 86-DOS, was re-branded as an operating system for the IBM PC. Source: https://www.computerhope.com/history/dos.htm
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Releasing 1 year after PC-DOS 1.0, this Digital Operating System was the first ever version officially titled MS-DOS. Source: https://www.computerhope.com/history/dos.htm
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This version of MS-DOS was released for the IBM PC XT, it introduced support for hard disk drives.
Source: https://www.computerhope.com/history/dos.htm -
With the introduction of 3.1, Microsoft also reveals that 3.1 will include support for Local Area Networks. Source: https://www.computerhope.com/history/dos.htm
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Microsoft introduces the first incarnation of the windows saga, released as an OS for Apple's Macintosh. Source: https://www.theguardian.com/technology/2014/oct/02/from-windows-1-to-windows-10-29-years-of-windows-evolution
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With the release of Windows 95, Microsoft releases a whole slew of new features, such as a new Operating System instead of a graphical interface running on top of MS-DOS. Source: https://www.cs.umd.edu/hcil/muiseum/systems/win95.html
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After windows xp released, it became very popular for its ease of use and its reliability, this is because it was aimed at both business and consumer markets. Source: https://www.itproportal.com/2015/05/26/heres-why-windows-xp-was-so-damn-good/
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The beginning of Vista's release was off to a shaky start as it had many glaring issues, such as how much space it took up on the computer, badly written 3rd party drivers, and zealous advertising. all of these issues were fixed later on by Microsoft's release of service packs, but first impressions count the most, and users dubbed Vista as a failure Source: https://www.dedoimedo.com/computers/windows-vista-best.html
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The most recent installment of the Windows line, Windows 10 has easily become the most popular operating system Microsoft has released. The OS got off to a rocky start at release as it had numerous bugs and other complications, but the OS became more reliable after the issues were patched out Source: https://www.businessinsider.com/microsoft-windows-10-operating-system-everything-wrong-2019-3
