- Letter:
AllA(25)B(29)C(17)D(9)E(10)F(39)G(41)H(11)I(8)J(8)K(6)L(9)M(17)N(11)O(4)P(33)Q(6)R(9)S(18)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)