A microprocessor is an electronic circuit or chip that can process data, perform calculations and act upon the results by issuing instructions. In other words, it is the processing chip which makes the computer or electronic device work.
A microprocessor is normally a single chip such as the one shown opposite.
They are found inside the CPU in all computers, laptops, netbooks, tablets and so on.
However, they are also found embedded in many other electronic devices that you are likely to use, be it in your home, workplace, school or everyday life.
Microprocessors vary in size and processing power but essentially they all perform the same function, to process data and instructions in order to ensure that the device works as intended.