grey at despair.rpglink.com (Steve Lamb) writes: > I always get it's (contraction) and its (posessive) correct yet haven't a > clue of who and whom. With me it's which/that; no one has ever explained the precise rules between them, yet I'm always . "Python, that has been developed since 1989, is a ..." vs. "Python, which has been...". --amk