This is web 2.0

OK, so the term web 2.0 sucks, for the exact same reason any other label sucks: it over-generalizes, freezes reality into a limited confine, and means different things to different people.

But if we’re going to have a term (and we do) and we’re going to define it (and we are), then this ought to be part of the definition.

Here is 37 Signals’ design philosophy in three pictures. If you don’t know which one is web 2.0, you don’t know web 2.0.