Observer Design Pattern vs “Listeners”

Question

It seems to me that the Observer design pattern as described in GOF is really the same thing as Listeners found in various toolkits. Is there a difference between the concep

Answer 1

A listener may well be an implementation of the observer pattern. A listener is essentially waiting for an event to occur on a given object, which is what an observer does.

I know you're not after a language specific answer, but it's kind of hard to talk about this stuff in the abstract. So if I were to investigate this in .NET, I'd be inclined to open an assembly containing a listener in .NET Reflector, which will allow me to disassemble the assembly and check its logic against a design pattern.