The term                        designates equipment that might be added to a computer system to enhance its functionality.

The correct answer is peripheral device because peripherals are external hardware components that plug into system buses to expand processing capabilities.

• peripheral device: This is the correct choice. Peripherals connect to the motherboard through auxiliary expansion interfaces (like USB or PCIe ports). Common examples include secondary display monitors, scanning devices, layout printers, and input controllers.


• Incorrect Options:
  
  
  
  • digital device / system add-on / disk pack: These are incorrect. These terms either represent general categories of hardware or specific types of storage storage packages, rather than the broad classification for auxiliary hardware expansion components.