- Letter:
AllA(23)B(12)C(14)D(9)E(5)F(11)G(8)H(14)I(7)J(6)K(88)L(7)M(14)N(10)P(10)R(7)S(16)T(12)U(10)More
- Operating System:
AllWindows 95(5)Windows 98(5)Windows Me(5)Windows XP(7)Windows Vista(7)Windows 7(7)Windows 8(7)Windows 10(7)Windows 2000(7)Windows Server 2003(7)Windows Server 2008(7)Windows Server 2012(7)Windows Server 2016(7)Mac OS Classic(5)macOS(7)Linux(7)Android(7)iOS(7)