when to use who/whom?

I consulted The Brief Handbook (AKA The Brief-Holt Handbook) and I have no idea WTF it is talking about because it uses the terms "subject" and "object." It says that when the pronoun (who/whom) serves as the subject of its clause, use "who" or "whoever." But when the pronoun functions as the object of its clause, use "whom" or "whomever." Does anyone know WTF "subject" and "object" mean or have a simpler explanation for this? I suppose I could just look up what the subject and object are in the Brief Handbook, or use google, but that would just be so much work. I''d rather be misinformed by someone here. ___________________________________________________________ Proceeding on a brutal rampage is the obvious choice. Where to find the intensity (Updated Jan 23, 2004)