Terminated: unknown
There are two sliders, marked with black text on a black background. The leftmost is the power slider, the second one can be slid to Σ. When in that position all the results of performed calculations are added to the calculator’s memory. Use RM to read-out the current total.
A non-zero value in memory is indicated by an "L" indicated as the leftmost digit. Errors are indicated by a "C".