The magazine Entertainment Weekly gives grades, not only for movies but for television shows, CDs, books, CD-ROMs, Web sites, and much else. The grades range from A+ straight down to F (although it seems that only Pauly Shore movies are worthy of that honor). If you count them, you see 13 possible grades. We would need 4 bits to represent these grades: 0000 = F 0001 = D– 0010 = D 0011 = D+ 0100 = C– 0101 = C 0110 = C+ 0111 = B– 1000 = B 1001 = B+ 1010 = A– 1011 = A 1100 = A+ We have three unused codes: 1101, 1110, and 1111, for a grand total of 16.
