Input
The very first computers only accepted "punch cards" as input. Computer scientists had to carefully punch out their instructions and then feed the cards into the computer. Fortunately, computers have come a long way since the 1970s, and we can now input data into them using a variety of easy-to-use devices.
The most common input devices are the keyboard, mouse, and touch screen. There are hundreds of other input devices, like microphones to capture sound waves, scanners to capture image data, and virtual reality devices to capture our body movements.
Computers also receive input from their environment using "sensors", like motion sensors that detect changes in movement.
Output
Once the CPU is done processing the data, it often needs to output a result.
A standard output device is the computer monitor, which displays text, images, and user interface elements by lighting up thousands of pixels with different colors.
There are many other ways a computer could output data. As long as the output device can interpret a stream of 1s and 0s, it can turn that data into anything - headphones output sound, printers output ink on paper, and projectors output light.
Hope this helps!
Have a great day!
