The term TAB, SAY can be found in the crossword solutions as KEY, which is a three letter word. KEY is often used to refer to a physical object, such as a KEY to a door or a KEY to a lock. It can also refer to a code or password that is used to gain access to something, such as a computer system or a website. In addition, KEY can also refer to a button on a keyboard or a remote control. Finally, KEY can also refer to a musical note or a set of notes that form the basis of a song.