I've managed to decifer most of the abbreviations on the my boys' school supply lists. However I am stumped by 1/2" RBL 10x8 WB Notebook. I understand that it is some type of wire-bound (WB) notebook. But I'm clueless on the RBL stuff. This is for 2nd grade so I am wondering whether it might have something to do with dotted lined notebook paper. But I don't know how you get RBL out of dotted-lined paper. Any suggestions from teachers or anyone else?