Terminated: unknown
It is a calculator with 10-digit accuracy and an 11-digit fluorescent display. When showing exponential numbers the displayed accuracy is reduced to 8-digits.
It has all the common scientific functions and memory. There is no operator precedence and no parenthesis so its memory is handy for more complex calculations.
Multiplications and divisions can be repeated by pressing the operator keys × or ÷ twice. Press = repeatedly to repeat the operation.
The workings of the xy function 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)
This works nicely for positive values of x but will result in an
error when x is zero or less. Not a big problem because powers of negavive
numbers behave counter intuitive anyway (producing non-complex results
only for integer values of y or fractional values of y with an odd
denominator).
Its angular mode is determined using a slider.
The site Le Rayon des Calculatrices has a nice article (in French) on this SPERRY REMINGTON and the CASIO fx-101 here (link validated 2025-12-23).