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