- Letter:
AllA(29)B(31)C(18)D(10)E(9)F(43)G(42)H(12)I(9)J(8)K(8)L(10)M(27)N(12)O(4)P(34)Q(6)R(12)S(19)More
- Operating System:
AllWindows 95(9)Windows 98(9)Windows Me(9)Windows XP(9)Windows Vista(9)Windows 7(9)Windows 8(9)Windows 10(9)Windows 2000(9)Windows Server 2003(9)Windows Server 2008(9)Windows Server 2012(9)Windows Server 2016(9)Mac OS Classic(9)macOS(9)Linux(9)Android(9)iOS(9)