- Letter:
AllA(18)B(16)C(18)D(11)E(6)F(14)G(10)H(12)I(9)J(4)K(6)L(9)M(18)N(12)O(4)P(12)Q(4)R(9)S(20)More
- Operating System:
AllWindows 95(16)Windows 98(16)Windows Me(16)Windows XP(16)Windows Vista(16)Windows 7(16)Windows 8(16)Windows 10(16)Windows 2000(16)Windows Server 2003(16)Windows Server 2008(16)Windows Server 2012(16)Windows Server 2016(16)Mac OS Classic(16)macOS(16)Linux(16)Android(16)iOS(16)