FIFO stands for "first-in, first-out". It is a basic principle of swapping at PBS.
FIFO as it applies to requests:
- The copy of any ISBN Posted into the system earliest will receive the first request.
- Books "go into line" for requests at PBS as they are posted.
- As copies are mailed out, your book moves forward in the queue
- Any copies posted after your copy will go "in line" behind it.
- Does FIFO mean that titles that are very numerous in PBS aren't worth listing? Definitely not! Some titles are requested very often, and the queues for those books move very fast.
FIFO as it applies to the Wish List:
- The member who put an ISBN on her Wish List first is the first member to whom the book will be offered first when a copy becomes available.
- Wish List queues can move fast, even long ones. It depends on how many copies of that book enter the system, and how quickly they are read and re-posted.
Is the FIFO rule unbreakable?
No. Here are some exceptions:
How can I tell how many copies of a book are in the system?
How do I direct my request for a book to a specific member?
Can I post a book directly to someone's Wish List?
How to post a book