Binary order is the simplest and fastest sort order. The collating sequence for this sort order is based on the numeric value (0 through 255) of the characters in the installed character set. Using the binary sort order, ZYXWV sorts before abcde because the character Z precedes the character a in all character sets. Sorting for extended characters (such as characters with diacritical marks) depends on the installed character set.
If you want your data to sort in a more conventional order, choose one of the dictionary sort orders. Remember, however, that dictionary sort orders come with a tradeoff in performance.