What is Unix used for?

Unix is a computer operating system. It tells the computer how to work. Your computer is actually quite stupid. It knows how to do one thing. When it starts up, it knows how to do one of two things, they are either start spinning the hard disk, or move the memory from location a into the processor. Then the operating system starts telling the computer what to do. It might tell it to take orders from the screen, to add and subtract, to print, to use the internet and how to use the internet, or to do something else.