Hi Torontogal.
You might want to check the
DizPINdex for a more complete list of terms, but here are the answers to the ones you listed:
Open stock - Also known as Core, Open Edition, or Rack pins. These pins do not have an announced edition size. Many times you will find these are character or attraction pins. They are usually readily available on the racks and carts for a long time period.
Booster collection - A packaged set of pins that help boost your collection. For example, you can buy a booster package that contains nothing but Tinker Bell pins. (This term isn't listed on the DizPINdex.)
Castmember Lanyard - The Cast Lanyard Series was introduced several years ago as a unique way for Cast Members to trade pins with Guests. These Cast Lanyard Series pins are only available for trade from Cast Members. Guests can trade up to two (2) Cast Lanyard Series pins per Cast Member per day. "Cast Lanyard Series" is featured in a small box on the backstamp of each pin. These pins are not considered "Limited Edition" rather they are "exclusive" to Cast Members' lanyards. Every September a new series of "Cast Lanyard" pins is introduced.
These pins are created by the Walt Disney Parks & Resorts Merchandise Team. They are created so Cast Members in ALL lines of business can trade unique pins with Guests. The
Disneyland Resort has a Cast Lanyard Series that is different from the Walt Disney World Cast Lanyard Series.
Also known as the Hidden Mickey Collection. The name change is based on the current identifier found on Hidden Mickey pins, a small Mickey Mouse icon.
Hope this helps!
*Brian*
TheBlackPearl on PinPics and DizPins