Which among the following is the most common device that accepts letters, numbers and command from a user?Select one:a.Mouseb.Keyboardc.touch screend.USB

Break Down the Problem

1. Identify the devices listed in the options.
2. Determine the primary function of each device in relation to user input.

Relevant Concepts

1. Mouse: A pointing device that allows users to interact with graphical elements.
2. Keyboard: A device specifically designed to input text, numbers, and commands.
3. Touch Screen: A display that allows users to interact directly through touch.
4. USB: A universal connector used for data transfer or connecting devices, not primarily a user input device.

Analysis and Detail

1. Mouse: Primarily used for navigation and selection, but not for inputting letters and numbers directly.
2. Keyboard: The main device designed for typing letters, numbers, and commands.
3. Touch Screen: Allows for input through touch but does not have a physical layout for letters/numbers akin to a keyboard.
4. USB: Not an input device in itself, but rather a connection interface.

Verify and Summarize

The keyboard is universally recognized as the most common input device for text and commands, whereas others serve different functions or supplementary roles.

Final Answer

b. Keyboard is the most common device that accepts letters, numbers, and commands from a user.