I am currently working on a review of Diomidis Spinellis’ book “Code Reading – The Open Source Perspective”. I found a nice quote at the beginning of chapter five, “Advanced Control Flow”:

“It is necessary for technical reasons that these warheads be stored upside down, that is, with the top at the bottom and the bottom at the top. In order that there may be no doubt as to which is the bottom and which is the top, it will be seen to it that the bottom of each warhead immediately be labeled with the word TOP.”
(British Admiralty Regulation)

Had a good laugh when I read that 😉