Multiple Curve Fitting Program HP-41

[Graan]

I have used curvfit for adapting signals from sensors to microprocessors. In simplest case a linear position potentiometer giving position readouts and also tried fitting non linear values from a NTC resistor giving temperature readouts. So its not anything special. I used excel for this trying different models.
Getting my DM42 I just wanted to see if I can do a curvefit on the calculator. Its nothing I have to do, but just of interest. Dieter pointed out the built in functions for curvfit in HP42S.

In Excel there is polynomial curvfit. I have used it some times. I dont know if there is a program for polynomial curvfit for calculators?

Guess I was a bit unclear with my intent. I just found the program by Kolb in a PDF and thought it looked useful, but seems there are other ways as well.