IN THE BEGINNING THERE WAS THE COMMAND LINE.... The interaction human-computer has gone a long way since the invention of personal computers. In the beginning there was only a simple command-line interface (CLI), which was not a very intuitive interface. The only widely used device that you could use to interact with the computer was the keyboard. People needed a lot of skills to operate computers. New ways have been opened with the evolution of hardware and software. Inventions such as mouse or graphical user interface (GUI) changed the way we interact with the computer and allowed massive...