The most common input device used today is the keyboard. It is a peripheral device that allows a user to input text into a computer or other electronic device. The keyboard consists of a set of keys that are used to type letters, numbers, and symbols. The keys are arranged in a QWERTY layout, which is the most common keyboard layout in the world.
The keyboard is a very important input device because it allows users to interact with computers in a very natural way. It is also a very versatile input device, as it can be used to input a wide variety of data.
The following are the other options in the question and their descriptions:
- Motherboard: A motherboard is the main circuit board in a computer. It is responsible for connecting all of the other components in the computer together.
- Trackball: A trackball is an input device that is used to move the cursor on a computer screen. It consists of a ball that is rolled with the fingers to move the cursor.
- Scanner: A scanner is an input device that is used to scan images or documents into a computer. It works by shining a light on the image or document and then converting the light into an electronic signal.
- Mouse: A mouse is an input device that is used to move the cursor on a computer screen and to select items. It consists of a small, handheld device with two or more buttons.
The keyboard is the most common input device because it is the most versatile and user-friendly input device. It allows users to input a wide variety of data in a very natural way.