Base-2 (also called binary) number system uses only two symbols to code information. Most commonly, these two symbols are, 0 and 1.
Base-32 number system uses 32 symbols to code information. Most commonly, these symbols are, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 'A to V' (or alternatively 'a to v').