- Letter:
AllA(10)B(25)C(7)D(11)E(3)F(6)G(4)H(34)I(8)J(1)K(17)L(4)M(214)N(8)P(37)Q(3)R(6)S(11)T(6)More
- Operating System:
AllWindows 95(6)Windows 98(6)Windows Me(6)Windows 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(6)macOS(7)Linux(7)Android(7)iOS(7)