<human>:  What is the function of the ‘’ key on the Apple Computer keyboard?
<bot>: The <unk> key is a modifier key. It’s used to access special characters and functions. It’s a modifier key, so it can’t be used alone. For example, if you press the <unk> key, it will be replaced with the number 3. If you press the <unk> key again, it will be replaced with the letter l.