- Letter:
AllA(36)B(31)C(38)D(20)E(13)F(28)G(20)H(24)I(60)J(8)K(18)L(19)M(35)N(29)O(8)P(32)Q(4)R(18)S(39)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)