Most people will know how the AI in 2001 A Space Odyssey came to be called HAL. By the simple expedient of taking the letters IBM and applying -- to each.
How many remember how the Windows have all come to know and love started out as Windows NT?
It came about when Digital pulled the funding for the new version of it's VMS operating system, and Bill Gates swooped in and hired Dave Cutler, who basically took all the code with him to make the new version of Windows.
And stick the finger to his former employer, incremented VMS to get WNT.