Calcoo 这个科学计算器提供解除和恢复按钮，复件和粘贴功能， RPN 和代数的方式，两个记忆登记，和陈列对 y， z 和 T 记忆。
Software Description:
About Calcoo, This scientific calculator provides undo and redo buttons, copy and paste functions, RPN and algebraic modes, two memory registers, and displays for Y, Z and T registers.
