Key
A key is a small tool, device, or code that can be used to open a lock. The earliest keys were pieces of metal that engaged with a mechanism inside the lock. Today there are sophisticated electronic devices with microchips inside of them.
A key is a small tool, device, or code that can be used to open a lock. The earliest keys were pieces of metal that engaged with a mechanism inside the lock. Today there are sophisticated electronic devices with microchips inside of them.