Watson is an AI system developed by IBM in 2006, able to answer questions expressed in natural language. In the beginning, Watson was created to compete for an American television quiz called Jeopardy! At the first participation, however, it managed to answer only 35% of the questions. Following several improvements by an IBM team, Watson tried again in 2011, and this time it managed to defeat the human champions of the quiz.
During the game, Watson worked without being connected to the internet, exploiting an occupation of 4 terabytes of disk space. Later, it was used in many other completely different contexts, such as managing lung cancer treatment decisions at the Memorial Sloan-Kettering Cancer Center.
