Terminated: unknown
Its manual, which Ruud (ruudje2020) was so kind to scan for me, lists a lot of common operations as "SPECIAL FEATURES". Noteworthy are the "Accumulating memory register" and the "π Constant register in the LSI chip".
The "Accumulating memory register" is not directly obvious at first but the Min key actually behaves as an M+ operation, adding the number on display to the calculator’s memory.
It is quite thick, 2.75 centimeters.
There is a slider for the angular mode, radians or degrees.
The workings of the xy key might be puzzling to users of this calculator. When you enter a (positive) number and press the xy key an intermediate result is shown, being the natural log "ln" of the number entered. To obtain its power enter the value for y and press the = key. My guess is that this calculator uses this formula:
xy = e(y · ln x)
The
DR key repeats the "left part" of
the last calculation and is called the "Display Recall Key"
in the manual.
The four AA batteries all face the same way.