Do you know the difference between "symbol name" and "instance name" in Flash? Confusing the two names is a very common mistake among the less experienced Flash users. Believe it or not, but I have received quite a few e-mails, asking "what have I done wrong in this Flash project?", and most often it turned out that one or more Symbols of theirs just didn't have an instance name. That is why, in this tutorial, I'm going to try and draw clear dividing line between these two kinds of names. I'm also going to describe them briefly and show you where you may encounter them.