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Microsoft's MS-DOS turns 30 this week

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On July 28, 2011, 3:00 PM

Thirty years ago this week, Microsoft set in motion a series of events that would make them the largest name in personal computing and its founders some of the richest men on the planet.

On July 27, 1981, Microsoft finalized a deal to purchase what was then called QDOS (Quick and Dirty Operating System) from Seattle Computer Products. QDOS was authored by Tim Paterson, a programmer for SCP that had written the operating system for use on in-house hardware.

Once purchased by Microsoft, the operating system was renamed MS-DOS (Microsoft Disk Operating System) and was bundled with the IBM PC shortly after.

As the story goes, IBM came to Microsoft in 1981 and requested an operating system for their line of personal computers. IBM's original plan was to use Digital Research's CP/M-86 OS but the two were never able to iron out a deal. Instead, IBM went with Microsoft's 86-DOS and shipped it on IBM computers as PC-DOS. Microsoft paid a total of $75,000 for the eventual goldmine.

Paterson landed a job with Microsoft in May 1981 and eventually worked with the company on and off until 1998. He now runs Paterson Technology, a small company that develops unique hardware and software products near Seattle, Washington.

MS-DOS had a solid run and was updated several times since its debut.Its eventual demise would come in 1994, just a year before Microsoft released Windows 95. Microsoft has released several major revisions since WIndows 95, with current version Windows 7 being the fastest selling operating system in history.

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User Comments: 33

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  1. I think MS-DOS stopped at version 7.x before Windows 95 and 98 took over... I only think this because I distinctly remeber having backed up copies of my DOS with version 7 written on my 1.44 floppies... or maybe there were serevn install disks... but I recall it being version seven...

    Anywayz it would be cool if they released the source could at least for learning purposes. So programmers can learn about the OS that started it all.

  2. Happy Birthday! I liked DOS, actually.

    And believe it or not, I still use DOS commands quite often, even if it is through Windows 7 command prompt. That comment about good old Wolfenstein also brought back good memories.

  3. I still use DOS commands quite often, even if it is through Windows 7 command prompt.

    And you are not alone in this habit.

  4. Yup, most power users or IT pros will still be using DOS or the command prompt to get past the obscurities of parts of the GUI. I still cd command pretty often.

  5. Floppy-based versions of MS-DOS may have stopped with the advent of Windows 95 but the Windows 9x series was still pretty much DOS-based. I remember my last MS-DOS version was 6.22 before I switched to Windows 95. I think the last DOS version might have been version 8 which came with Windows ME although I've never come across any Microsoft documentation referring to such version. Just for fun, I still run my Lotus 123 version 2.4 spreadsheet and a couple other home-brewed programs from the 80s in my XP SP3 machine. Runs just fine under command prompt.

  6. I still run my Lotus 123 version 2.4 spreadsheet

    I still have quattro pro 4 buried somewhere on one of my PC's HDDs, although TBH I haven't used it in years, nor there seems to be any chance of it in near future.

  7. There is absolutely no reason to use Windows XP today. So no its not really being used very much now.

  8. And after 30 years I still miss it. DOS was always my favourite operating system. You had to know what you were doing to use it, but as someone else stated, YOU were in full control, if there was a background process it was because YOU put it there.

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