- Letter:
AllA(28)B(24)C(38)D(15)E(10)F(21)G(15)H(18)I(60)J(6)K(18)L(14)M(32)N(29)O(8)P(32)Q(3)R(14)S(34)More
- Operating System:
AllWindows XP(7)Windows Vista(7)Windows 7(7)Windows 8(7)Windows 10(7)Windows 2000(7)Windows Server 2003(7)Windows Server 2008(7)Windows Server 2012(7)Windows Server 2016(7)Mac OS Classic(7)macOS(7)Linux(7)iOS(7)