Terminated: unknown
A search on the net brought me to this Thimet site (link validated 2024-01-13) where some of the sliders’ functions are explained. The "n"-slider will show a counter, the two leftmost digits, displaying the number of calculations performed since sliding it into the "n" position. Still I do not know what the "A"-slider is for.
Also noteworthy, the display starts at the left side, not at the right side, when entering numbers. Another noteworthiness, dividing by zero does not cause an error, the result will be zero. Roots of negative numbers don’t error out either, they will display the root of the number as if it were positive.
A non-zero number in memory will display a period on the leftmost position.