> The term "X-Windows" (in the manner of the subsequently released "Microsoft Windows") is not officially endorsed – with X Consortium release manager Matt Landau stating in 1993, "There is no such thing as 'X Windows' or 'X Window', despite the repeated misuse of the forms by the trade rags"[60] – though it has been in common informal use since early in the history of X[61] and has been used deliberately for provocative effect, for example in the Unix-Haters Handbook.[8]
The Wikipedia article you posted says:
> The term "X-Windows" (in the manner of the subsequently released "Microsoft Windows") is not officially endorsed – with X Consortium release manager Matt Landau stating in 1993, "There is no such thing as 'X Windows' or 'X Window', despite the repeated misuse of the forms by the trade rags"[60] – though it has been in common informal use since early in the history of X[61] and has been used deliberately for provocative effect, for example in the Unix-Haters Handbook.[8]