click, double-click, right-click: To click is to tap a mouse button, pressing it down and then immediately releasing it. Clicking a mouse button is different from pressing (or dragging) a mouse button, which implies that you hold the button down without releasing it. When used as an instruction, click means to move the mouse pointer over that object and click the left mouse button (sometimes called button number one). Some operations may require a double-click , which means that you click the (left) mouse button twice in rapid succession. Some operations require that you click the right mouse button (sometimes called button two. Even though a mouse can be programmed to switch buttons, by convention 'clicking' refers to the left mouse button. In this guide, the term right-click is used anywhere you need to use the right mouse button. clipboard: A special memory buffer that is used to temporarily store data that is being copied to another location. When you cut and paste data in a Windows application, you are removing the data from its source location and placing a copy of it in this buffer area, then pasting it from the clipboard to its final location (target).