History Stack is Available in ALL HP Calc Sub-applications.

The Palmtops User's Manual refers to a "history stack" when describing how to use HP Calc. Veteran users of HP calculators call this history stack the "RPN stack." You can see the stack registers in HP Calc by starting the Arithmetic or Math sub-applications and pressing Menu, Options, Calculator Modes and checking the Show Stack option. If you use the algebraic mode of data entry the stack registers will be labeled (1), (2) and (3). The register below the line would be called (0). If you're using the RPN mode of data entry, the stack registers will appear as Y, Z and T. The X register is the one below the line. There is also a Last X register that is not shown. It is an automatic register that preserves the last value that was in the X or (0) register before an operation was performed. The stack (history) registers won't appear in any of the other sub-applications such as Cash Flow or TVM. However the registers are still available in all these subapps. For example, you can open the List Stat application and add four numbers to the list by repeatedly pressing the Enter key and the RollDown key "V."