Calculating device and method capable of displaying history stack values.

摘要

A calculating device is presented which displays a stack containing values most recently calculated and utilized, in accordance with the preferred embodiment of the present invention. The calculating device also displays a label for each value. When a new value is added to the stack, the stack labels are searched to see if there a value on the stack having the same label. If so the duplicate value and its label are removed from the stack.