- Letter:
AllA(16)B(29)C(11)D(6)E(7)F(41)G(19)H(9)I(5)J(2)K(5)L(6)M(50)N(13)O(3)P(32)Q(6)R(5)S(54)More
- Operating System:
AllWindows 95(4)Windows 98(4)Windows Me(4)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(4)macOS(5)Linux(5)Android(5)iOS(5)