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