From KDE UserBase Wiki
    The Summary Screen
    KInfocenter gives you a host of information about your hardware and its capabilities


    Areas of particular interest might be

    Your current memory status
    Your energy consumption statitics

    as well as

    • The status of any Samba shares
    • Processor information
    • Sound capabilities
    • Your X-server and video capabilities

    and much, much more

    You can see its manual here

    Hints and Tips

    If you have problems expanding the tree display, this is because KInfoCenter uses the following methods:

    Left Arrow: Collapse
    Right Arrow: Expand
    Up: Up
    Down: Down
    Enter: Select ( non expandable item )