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A Calculator Language

• Buttons and display screen,
• Single memory cell,
• Conditional evaluation feature.

Input	Display
ON
( 4 + 1 2 ) * 2
TOTAL	32
1 + LASTANSWER
TOTAL	33
IF LASTANSWER + 1 , 0 , 2 + 4
TOTAL	6
OFF

(See Schmidt, Figures 4.2 and 4.3)