From the UCLA Library Digital Collection:
Oh, if only library clerk Carolyn Folmer had just been instructed to turn the book "charging" machine around... then the Los Angeles Public Library could have claimed being the first library to offer a patron self-check out machine. :)
Hmmm... on 2nd thought, maybe LAPL was the first. I really don't know. But I bet someone out there does. If you know who was the first PL to offer patron self-check, please leave me a comment. I'm curious now... Thx.
Discovered via Librarian in Black.