I am on pinpics right now. I am looking around trying to get familiar with everything to do with pins. I was just wondering on some pins I see that it says retired. What does that mean? I can guess what it means, but why are those different from the other pins. Also the pins have numbers by them. Pin #17 or whatever. 17 of what? & does anybody know the very first pin ever released? Thanks for your help. Cristen