The term 'KEY' can be found in three different crossword solutions: KEYBOARD, KEY, and ENTER. The first solution, KEYBOARD, refers to a device used for typing on a computer or other electronic device. It is composed of keys that are pressed to input data into the system. The second solution, KEY, is a physical object used to open a lock or secure a door. It is usually made of metal and has a specific shape that fits into the lock. The third solution, ENTER, is a command used to input data into a computer system. It is typically used to start a program or access a file.