This technical report provides rules for the alphabetical arrangement of headings in lists of all kinds, such as bibliographies, indexes, dictionaries, directories, inventories, etc. It also covers the sorting of Arabic or Roman numbers, and other symbols. It consists of seven rules that cover problems which may arise in alphanumeric arrangement of headings. The technical report is based on the traditional order of letters in the English alphabet and that of numerals in ascending
arithmetical order. It does not address issues concerning meaning or type of headings. The rules can generally be applied by human beings as well as by computers. Each rule is followed by illustrative examples.