Why are there no other commercially successful operating systems in the market other than Windows and Windows?

Started by Zain, November 17, 2016, 07:04:54 PM

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Joe

November 17, 2016, 07:04:54 PM
Hello everyone, I have a little problem a little special, why are there no other commercially successful operating systems in the market other than windows and windows? Please inform me promptly.
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