Having a discussion with a colleague about why we use an Alpha/numeric stores location system? Also why we start with number one at the bottom of a shelving system and not at the top. My argument of "We just feckin do and thats it!" didn't wash to well with her. So how come the military, do it this way? SK p.s I was told why when I was in and could not remember then. So Ive no chance 10 years later.