It's easy to get annoyed when a password reset makes your email program not open, but that's a small problem compared to the software problems that grace this list of history's worst software bugs. Ranging from counter-espionage to medical technology mistakes, the list is enough to make any CIO cringe. The article's author, Simson Garfinkel, gives us this entertaining look at the biggest mistakes in the computer world. A personal favorite: the Mariner I space probe had to be brought down over the Atlantic due to an improperly sequenced code. The cause was a misunderstood calculation hastily written in pencil on a piece of paper.