R1 = Round 1 Award. Bid a line, then SAP to your hearts content. Your final line could look nothing like what you were actually awarded.
BU = Build Up line. Leftovers in Open Time after the SAP.
LCR = Long Call Reserve. 12 hour callout.
SCR = Short Call Reserve. 2 hour callout, 1 in TYS. Can be converted to Hot Reserve a few times a month.

According to the latest company email, qualified applicants are up over 500%.