Hardware units refer to the physical components of a computer or electronic device. These units include items like the central processing unit (CPU), memory (RAM), hard drives, and motherboards. Each hardware unit plays a specific role in the overall functionality of the device, working together to process data and execute tasks. In addition to computers, hardware units are also found in other devices such as smartphones, tablets, and gaming consoles. These units can vary in size and complexity, but they all serve the purpose of enabling the device to perform its intended functions efficiently.