The Command key (⌘), also historically known as the Apple key, clover key, open-Apple key, splat key, pretzel key, propeller key, squiggly button, AppleSquiggle, hairball, butterfly key, the quad button , or meta key, is a modifier key present on Apple keyboards. The Command key's purpose is to allow the user to enter keyboard commands in applications and in the system. An "extended" Macintosh keyboard — the most common type — has two command keys, one on each side of the space bar; some compact keyboards have one only on the left.