Most computers allow the user to change important internal settings that affect the systems functions.
The HP 95LX is no exception. It comes with a simple built-in program called SET UP that lets you change selected system settings, including changing the alarm volume and setting the baud rate of the serial port.
However, certain important control functions can only be accomplished from the DOS command line, which is not available unless all built-in applications are closed. Other important settings cannot be changed at all unless you are an experienced programmer.
Several utility programs have been written by programmers which allow users to view and/or change these system settings on the 95LX.