The Casio Data Bank is a digital wristwatch that combines accurate timekeeping with features like a calculator, daily alarm and stopwatch. The watch is easy to program and use.

The number keypad on the Casio Data Bank watch is used when operating the watch's calculator function. The keypad does not have a button for the decimal point; use the keypad's "PM" button instead. The number keypad is also used to input the correct times or dates when setting the alarm, time and date functions on the Casio Data Bank. The "0" button on the number keypad is also used to reset the stopwatch while in Stopwatch mode.

The "B" button on the Casio Data Bank wristwatch performs multiple functions. When setting the time and date or an alarm on your Casio Data Bank, the "B" button is used to enter and exit the setting screen. In Calculator mode, the "B" button is used to turn the key chime on and off.

The "C" button on the watch is used to cycle through the watch's various modes. It is also used to advance the flashing when setting the alarm, time and date on the Casio Data Bank. In Calculator mode, the "C" button is used to clear the calculator.

The "PM" button is used to toggle between "AM" and "PM" when setting the time, date and alarm functions. The "PM" button is also used in place of a decimal key when in Calculator mode.

The "+" button is used to start, pause, restart and stop timing while in Stopwatch mode. It is also used to toggle between the 12-hour and 24-hour formats when setting the time, date and alarm functions on the Casio Data Bank.