RPN Calculator 48 is a polished RPN replacement for Apple's built-in calculator: - Starts quickly - Large buttons - Easy-to-read display - Same scientific functionality as Apple's calculator - 256 entry stack (4 visible) - 6 memory buttons (A-F) - 50+ levels of undo/redo - Saves state on exit ** Use swipe gestures to undo/redo operations!! ** The ergonomics (screen and keyboard layout) of RPN Calc. 48 were inspired by HP's outstanding 48-...