IPod, launched in 2001, was just one of the many MP3 players of the time, but was the one that, surely, had the biggest impact. It could store around 1000 songs at a time when it was practically inconceivable to create playlists and shuffle tracks. The digital music revolution had started.
GUI, or Graphical User Interface, was recognized by no other than Steve Jobs, as the next step in computer development. They know how to uninstall programs on mac on the easy way, full explanation can be found here. This was in 1984 and today almost every computer communicates to its user through a GUI. Even though it was not conceived at Apple, Jobs was far sighted enough to see its future value – Apple built around the ideas of Xerox Park. Command prompts and codes were history and a much more accessible computer was born.