The mode selection key is actuated to select {TAIL ~ a memo mode} for inputting and printing out memo data and a calculation mode for operating {HEAD ~ arithmetic calculation} 
The mode selection key is actuated to select { TAIL ~ a memo mode } for inputting and printing out memo data and a calculation mode for operating { HEAD ~ arithmetic calculation }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD