Question
I know what it is: Mathcad and Mathcad Prime!
Correct names Mathcad and Mathcad Prime are Mathcad and Mathcad Jr.
There are a Father and a Son.
The Father is much more experienced than his Son, but the Father had a career coming to an end.
The Son can not yet do much of what his father could do.
But the son gradually from perenemaet experience of his father and learns a lot what you do not know the father.
Yet there is the illegitimate son - SMath.

