This may seems like a rhetorical question, but is it? if you've ever questioned the need for the pdf, here's is the answer.
I came across the video on you tube posted up by adobe veteran lori defurio, entitled "introducing adobe acrobat 1.0". the video is a "mock - umentary" presenting a comecial "day in the life of" look at the kind of office workflow we'd be stuck with if it weren't for the pdf file format.
you just can't help but laugh at how these office workers get their job done - because at ome point or another, you probably did the same thing.