This page gives information about the type of keyboard and mouse you
have.

Keyboard: INFOPLUS checks if you have an enhanced (12 function key)
          keyboard, and if your computer supports it. It also shows the
          current state of the various lock keys.
          The buffer holds keystrokes you type ahead. The standard buffer
          holds 15 keys (each key takes 2 bytes.) Many buffer extenders
          hook the keyboard at a lower level, and therefore won't show up
          in the buffer size count.
Internal modem/serial printer: This lets you know if an equipment word bit
                               is set. This is typically only used in the
                               PCjr.
Game port: INFOPLUS checks for a game port, and also tells you if the
           equipment word reports one.
Mouse: If you have a mouse and a Microsoft or compatible driver, you will
       get information about your mouse.
       If you have a serial mouse, it could take several seconds for
       information to be displayed, especially if you are connected to
       COM2. HINT: This also affects Windows' start-up time.
       Mickeys are a measurement of mouse movement. The numbers shown are
       the number of 'mickeys' needed to move the cursor one pixel (or
       spot) on the screen.