- Letter:
AllA(11)B(10)C(11)D(6)E(4)F(9)G(9)H(18)I(7)K(14)L(6)M(14)N(8)O(5)P(13)R(6)S(12)T(11)U(9)More
- Operating System:
AllWindows XP(6)Windows Vista(6)Windows 7(6)Windows 8(6)Windows 10(6)Windows 2000(6)Windows Server 2003(6)Windows Server 2008(6)Windows Server 2012(6)Windows Server 2016(6)Mac OS Classic(6)macOS(6)Linux(6)iOS(6)