RPNcalc Lite-----------------------------------------------------------------------> This software is for Newton 2.0 and 2.1 Newtons ONLY. -----------------------------------------------------------------------What is it?RPNcalc Lite is a small, five-function RPN calculator intended as a replacementfor the built-in Newton calculator app for those who prefer RPN.  It was designedto be small in both program size and heap usage.This program is freeware; if you desire a more full-featured RPN calculator tryRPNcalc.--What are the functions?RPNcalc Lite is a five-function calculator with a four entry stack.  Numbers canbe entered in either normal notation (ie. 4.32) or exponential notation (4.3E+2).The display is akin to the "float" mode on many RPN calculators.  There are nooptions to choose different display modes (the full RPNcalc can do this).The program has two states: display mode or number editing mode.  While innumber edit mode the bottom line will show on the left side of the display.  Indisplay mode the bottom line will show the zero stack entry on the right side.Pressing numbers while in display mode places you in number editing mode, whichremains until either the 'Enter' key is pressed or a numeric operation key is pressed.The back arrow key removes digits from the number currently being input innumber editing mode, or drops the stack by one if in display mode.The 'Clear' key removes all numbers in the edit buffer while in number editingmode; if in display mode pressing clear will cause a 'Clear?' prompt on the topline.  Pressing 'Clear' again will clear the entire stack, or any other key willcancel the clear mode.The entries in the stack can be rotated up and down using the R (up and downarrow) keys, provided there are enough entries on the stack to rotate.The 'Swap' key will swap the bottom two entries in the stack.The 'Undo' key can undo all arithmetic operations (but just the last operationperformed), and some stack functions.  It cannot, however, undo stack rotates(just do the opposite rotation).--Error messagesThe error messages in RPNcalc Lite are pretty basic, and arise from thefloating-point exceptions in the processor on the Newton.  Entering numbers(or calculating results) larger than1E+308 or smaller than 1E-308 willproduce an 'Overflow' message in the top line of the display.'Error' will be displayed in the top line of the display if an incorrect keyis pressed, or the square root key is pressed with a negative number in thestack 0 entry.--Save stateRPNcalc Lite saves the entries in the stack when the program is closed sothey can be used the next time it is run.  Upon deletion of the program theseentries are removed from the system soup.