- Letter:
AllA(12)B(17)C(168)D(3)E(2)F(20)G(13)H(9)I(5)J(12)K(13)L(16)M(10)N(5)O(2)P(13)Q(2)R(7)S(8)More
- Operating System:
AllWindows 95(99)Windows 98(99)Windows Me(99)Windows XP(99)Windows Vista(99)Windows 7(99)Windows 8(99)Windows 10(99)Windows 2000(99)Windows Server 2003(99)Windows Server 2008(99)Windows Server 2012(99)Windows Server 2016(99)Mac OS Classic(99)macOS(99)Linux(99)Android(99)iOS(99)