PURPOSE: To support the preparation of a program by displaying the call name of a function, function explanation and call system or the like corresponding to the input of a key and inserting the call name to the program concerning the program preparation supporting device to support the description of the call name of the program.

CONSTITUTION: A dictionary 3 is provided to register the call name of the function, function explanation and call system as needed beforehand and corresponding to the input of the key, the call name corresponding to the said key is extracted from the dictionary 3 and inserted to a designated position.