Bipod comes from the Latin and Greek roots bi and pod, meaning "two" and "foot, or feet" respectively. A bipod is an attachment for either a photographical device or a weapon that creates a steady plane for whatever it may be attached. It provides significant stability along two axes of motion (side-to-side, and up-and-down). The concept for a bipod dates back to pre-20th century times, and is still used today by agencies such as NASA.