KR

KR: 1. Kind regards. 2. Another in the trite series of acronyms used to save microseconds on email. (see BW; Bz; IMHO; PCB; Tks)

PCB

PCB: 1. Please call back. 2. Passing the buck so that the other person has to take action rather then you. (see BW; Bz; IMHO; KR; Tks)

TBU

TBU: 1. True but unhelpful. 2. Thanks for pointing that out but it doesn’t help us at all; shut up.