[croes]

Will be pretty hard when multiple IT companies already use X as name for products, services or companies.

Even the logo is mistakable.

[vtee44]

Hell, even the open source. It also looks a bit better IMO.

https://en.wikipedia.org//wiki/X_Window_System

[JohnFen]

Yes, you and croes have an excellent point. We'll see if someone challenges the trademark (or sues for trademark infringement). That might be interesting.