11 OSes that Tried (and failed) to Take Down Windows

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Believe it or not, Microsoft’s Windows is 25 years old - which is certianly making some of us feel old. Despite a few ups and downs, growing pains, and BSODs, Windows has survived the test of time and continues to reign as one of the most popular operating systems available today. Of course that’s not to say there haven’t been other operating systems over the years that tried to steal the crown; in fact, there have been quite a few. Here’s a look at some of the biggest contenders Windows has had to overcome to get where it is today.

11: Darwin

Darwin is a Unix based operating system developed by Apple, released in 1999 in the first iterations of OS X. Darwin itself has never really been much of a threat to Windows, but as the foundation of OS X, it has proved to be the catalyst to Microsoft’s greatest competitor yet. Shortly after its release as part of OS X, Apple decided to make Darwin open source where it branched into several independent operating systems, such as OpenDarwin and PureDarwin, though none became particularly mainstream.

10: AmigaOS

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