Which of the following is an example of input hardware?

The keyboard is a prime example of input hardware because it is specifically designed to allow users to input data and commands into a computer system. Input hardware refers to devices that enable the user to enter information into a computer. A keyboard allows users to type text, execute commands, and interact with software applications, making it essential for user interaction with a computer.

In contrast, other devices such as a printer and monitor serve different functions. A printer is an output device that produces a physical representation of digital content, so it does not facilitate input. A hard drive, while integral to storing data, is classified as storage hardware rather than input hardware. Similarly, a monitor displays output from the computer but does not allow for input to be made. Understanding the classifications of hardware can aid in recognizing the various roles different devices play in a computer system's architecture.