Terminated: unknown
This calculator could store two separate programs. Programs are just key-sequences and can not be edited once entered. It is therefore important to use valid input data even when entering programs, for a program has to be re-entered when an error (invalid operation) occurs during programming. Simple loops were possible using the "RTN" operation.
It also has a wide range of statistical operations, including random numbers and two-dimensional functions.
Another plus of this calculator is the fraction key, two memories (K and M), and it can also convert between polar and rectangular co-ordinate systems.
This calculator (as do many other CASIO scientific calculators) uses one and the same key for both the constant π as well as exponents. This works as follows. When you first enter digits, the "EXP"-key will enable you to enter the numbers exponent, otherwise it will enter the constant π.
When a one-dimensional function is programmed in one of the programs, this calculator can calculate a partial integral of that function as well. This was really nice at school, you could verify the correctness your answer!
All in all quite a nice calculator, especially because it looked just like the standard school calculators.