PURPOSE: To enable the execution of a program set in compliance with the diversified application purposes of users by memorizing user data and program data separately so as to perform various processings according to the program data.

CONSTITUTION: Switches 12aW12d at a switch section 21 are operated and a program data for time counting of a 1-hour stop watch and program data for switching ON of a sound signalling section 29, lighting of an illumination lamp, reading of character data and the like and written sequentially into a control RAM25. Likewise, a user data such as character data required by users is written into a user data memory 24a. A flag 1 is written into a flag area J0 as judge flag for operation as 1hour stop watch. Likewise, if lighting of the illumination lamp and display of an alarm message are to be performed at an alarm time in addition to the emission of an alarm sound, the character data is written into an RAM 24 by a switch operation and a program for lighting of the illumination lamp and character display is written into a control RAM 25 and 1 is memorized into a flag J1.