Base-24 number system uses 24 symbols to code information. Most commonly, these symbols are, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 'A to N' (or alternatively 'a to n').
Base-3 (also called ternary or trinary) number system uses three symbols to code information. Most commonly, these symbols are, 0, 1 and 2.