A keyboard works by using a set of keys that, when pressed, send electrical signals to a computer or device. Each key corresponds to a specific character or function, and the keyboard translates these key presses into digital input. This process allows users to type text, execute commands, and interact with software. Most keyboards use a technology called mechanical switches or membrane switches to register key presses. Mechanical keyboards have individual switches for each key, providing tactile feedback, while membrane keyboards use a pressure pad system. Both types connect to devices via USB or wireless connections, enabling seamless communication.