- Letter:
AllA(35)B(31)C(35)D(20)E(12)F(27)G(19)H(24)I(17)J(7)K(12)L(18)M(34)N(24)P(24)Q(4)R(18)S(39)T(30)More
- Operating System:
AllWindows 95(3)Windows 98(3)Windows Me(3)Windows XP(4)Windows Vista(4)Windows 7(4)Windows 8(4)Windows 10(4)Windows 2000(4)Windows Server 2003(4)Windows Server 2008(4)Windows Server 2012(4)Windows Server 2016(4)Mac OS Classic(3)macOS(4)Linux(4)Android(4)iOS(4)