- Letter:
AllA(23)B(16)C(17)D(9)E(6)F(13)G(9)H(14)I(8)J(9)K(88)L(9)M(17)N(11)P(12)R(8)S(19)T(14)U(10)More
- Operating System:
AllWindows 95(7)Windows 98(7)Windows Me(7)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(7)macOS(9)Linux(9)Android(9)iOS(9)