An input device is a hardware component that allows users to enter data and commands into a computer or other electronic systems. Common examples include the keyboard, mouse, and scanner. These devices convert user actions into signals that the computer can understand, enabling interaction with software and applications. Input devices play a crucial role in how we communicate with technology. For instance, a touchscreen allows users to interact directly with what they see on the display, while a microphone captures audio input for voice commands or recordings. Each device serves a specific purpose, enhancing user experience and functionality.