I was trying to find the connection that how the study of semiotics can make sense in Interaction Design.

I am still skeptical about what part of a design can be studied with respect to semiotics? Is the design as a whole represents signs and symbols or part of a design.

As for a studying signs and symbols are concerned, it is clear that a sign has to meaning. the visual meaning which it makes from how it appears and a contextual meaning which it gets? If we think with that perspective, a design as a whole can be thought of that perspective, but sometimes a design can be really big in which case it is very suitable that parts of the design can become symbols.

What everyone else thinks about it?

I also want to know what others think on how semiotics can be used to study and critique an Interaction Design?