2 Enter 3 v2.1 -  a RPN Calculator for the MP2000 - is an RPN scientific calculator.

It was developed and tested on the Newton 2000 under OS 2.1. The program is freeware. RPN users should be familiar with almost all of the functions provided. 

This is a description of the less obvious. Handwriting is used to insert numbers. The '.', 'e' and '<-' buttons insert a decimal point, an e (exponent notation) and delete of the last character on the line, respectively. All standard HWR guestures can be used to edit the value. A small bulb to the left of the input line indicates a non-numeric content; such a value is not transferred to the X register.