OK, I'll bite. In my first job I had to buy a DEC hard drive for a VAX 11/750. It cost £14K (and that's when £ bought stuff) and gave 600MB (yes that's an M). Size of a washing machine. It also came with a DEC engineer to install it, and after it was setup I was left with 400MB and change. So lesson learned that day: never believe the quoted storage capacity.