This technical report provides rules for the alphabetical arrangement of headings in list 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 arrangements of headings. The technical report is based on the traditional orders of letters in the English alphabet and that of the numerals is ascending arithmetical order. It does not address issues concerning meaning or type of headings. The rules can generally be applied by human begins as well as by computers. Each rule is followed by illustrative examples.