[mikemaccana]

Windows began as an installable GUI, target than a whole system. It was only in 1995 that it started doing more than windowing.

[burgerbrain]

Even so, their trademark in that case was on the windowing system. Not on the UI elements generally called "windows".

[mikemaccana]

I'm going to flat disagree that windowing systems and window UI elements are separate fields of endeavor, in the same way that laundry detergent and computer Operating Systems are. I think most lawyers would too.

[mikemaccana]

Ahem, 'target' should be 'rather'. Hooray autocorrect.