Which of the following is NOT considered a storage device?

The keyboard is not considered a storage device because it serves as an input device, rather than a means of storing data. Its primary function is to allow users to enter data into a computer system, translating key presses into digital signals that the system can process.

On the other hand, hard disks, ROM (Read-Only Memory), and RAM (Random Access Memory) are all types of storage devices. Hard disks are magnetic or solid-state storage media that retain data even when powered off. ROM is non-volatile memory that stores crucial firmware permanently, while RAM is volatile memory utilized for temporary data storage while the system is running, enabling quick access to active data. Each of these components has a clear role in data storage, differentiating them from the keyboard's input function.