Information processing apparatus, information storing device, system for extending functions of information processing apparatus, method for extending functions of information processing apparatus, method for deleting functions thereof, and program for extending functions of information processing apparatus and program for deleting functions thereof

A method for extending the functions of an information processing apparatus, wherein the method comprises the steps of:

• connecting an information storing device in which information for function extension and information on the number of possible function extensions is held to an information processing apparatus having functions, the use of which is restricted;
• selecting a use start function in the information processing apparatus;
• checking whether information on the number of the possible function extensions concerning the use start function is within the allowable range;
• decreasing the number of the possible function extensions if it is within the allowable range;
• and
• informing the information processing apparatus of the information for function extension.

A method for deleting the functions of an information processing apparatus, wherein the method comprises the steps of:

• connecting an information storing device in which information for function extension and information on the number of possible function extensions is held to an information processing apparatus having functions, the use of which is restricted;
• selecting a use terminating function in the information processing apparatus;
• deleting a function restriction canceling key for selected use terminating function from the information processing apparatus;
• and
• increasing the number of possible function extensions.