- Letter:
AllA(18)B(15)C(18)D(10)E(16)F(46)G(15)H(12)I(10)J(4)K(7)L(9)M(44)N(12)O(4)P(14)R(10)S(19)T(15)More
- Operating System:
AllWindows 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)macOS(9)Linux(9)Android(9)iOS(9)