It looks a lot like a rat, so it is called a mouse. One of the narrow ends is directly connected to the CPU. The top of the mouse has two presses (although many mice have three) , the button on the right is called the right button and the button on the left is called the left button. When the computer is open, moving the mouse, moving an arrow is called mouse pointer. And this movement is called drug mouse. To select or select the icon of a file or folder, the mouse pointer is hovering over it and once the left mouse button is pressed, it is called a single click. And to open it, you have to press the left mouse button twice. This double pressing is called double click of the mouse. When you press the right mouse button, it is called right click. Right-clicking doesn't usually select or open a file folder, but it does provide an instant menu command list.