Hi Moogly, welcome to pinstack.
This may help answer what is a pin...
To find your pin there are many ways. You can open a text entry field and type "mypin" and after you hit the spacebar your pin will pop up automatically in place of the work "mypin", its called auto text.
You can also hold down the alt key, and then press "r" "a" "c" "e" and that will show info about your BB, including your pin.
Last but not least, you can go into options and then status, and your pin will be near the bottom.
Let us know if we can help you further.