Alphanumeric order refers to a set of filing rules to follow when putting symbols, numbers and letters in order both numerically and alphabetically. For example, "100% American" would come before "apple" in an alphanumerically sorted list.
The basic principles of sorting words, symbols and numbers alphanumerically are to first list words alphabetically, then for any subsequent unit. For example, for "Johnson Boats and Johnson Cars," sort the subsequent units alphabetically as well. Symbols are first in sort order, followed by numerals. For example, "#1 Autos" comes before "12 Brothers Auto." Another rule to follow is nothing comes before something. For example, oak comes before oak tree.