पहले कंप्यूटर माउस का आविष्कार करने का श्रेय किसे दिया जाता है?

Which of the following input devices is used for the identification of a person by measuring their biological features?

Which input device is used to convert a printed image, diagram, or text into a digital format on a computer?

Under which category of keys on a standard computer keyboard do Ctrl, Shift, and Alt fall?