Simple, uncluttered, powerful. This calculator has no buttons because it's controlled by your keyboard, freeing up valuable screen space. What it lacks in clutter is made up for in features. You can resize the window, make it float above all windows, or make it full screen. Choose different color schemes. Ten memory registers save their contents when you quit the app. Perform date calculations. Record macros and speed up your work. For advanced users, features like RPN mode and fixed point display are just a keystroke away. A really awesome help window tells you what keys to use.