So they claim, sometimes. However:

There was an operating system designed in the mid 70s called VMS. It was the primary operating system that ran on the VAX computers developed by Digital (DEC). The VAX itself was an offshoot of the popular PDP series of computers. Regardless, VMS became the most popular operating system on the VAX machines (you'll find some people refer to VAX and VMS interchangeably, even though that's incorrect).

One of VMS's principal architects was Dave Cutler. Later, Dave would go on to be the head of the project at Microsoft that was their portion of the OS/2 project. Windows NT and VMS share a lot of ideas. The most prominent from a user point of view is probably file permissions, but there are many others. Including the fact that if you add one letter to each of the ``digits'' of VMS, you get WNT. Coincidence? Cutler claims that it's not.