In Mac OS and Mac OS X, what is the Command key?

The Command key is the most common modifier key in Mac OS X. Many menu items, such as Quit, Close, and Save, have a keystroke shortcut using the Command key. To use such a shortcut, hold down one of the Command keys and press the letter key for that item. For example, to save a document in most applications, hold down Commmand and press  s .

Apple keyboards usually have one Command key on each side of the Spacebar. Normally the key will have a cloverleaf icon, and, on older keyboards, an apple. Also on older keyboards, the word "command" may not be present or may be abbreviated (e.g., "Cmd").

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