- Letter:
AllA(21)B(29)C(13)D(9)E(7)F(36)G(42)H(7)I(5)J(4)K(7)L(10)M(22)N(9)O(3)P(34)Q(2)R(9)S(11)More
- Operating System:
AllWindows 95(7)Windows 98(7)Windows Me(7)Windows XP(5)Windows Vista(5)Windows 7(5)Windows 8(5)Windows 10(5)Windows 2000(5)Windows Server 2003(5)Windows Server 2008(5)Windows Server 2012(5)Windows Server 2016(5)Mac OS Classic(7)macOS(5)Linux(5)Android(5)iOS(5)