Apple, Microsoft, Alphabet and Amazon have become the big players in the market. Their combined value exceeds 7.5 trillion dollars, the equivalent of more than five times the GDP of Spain. Now, what exactly explains the success of these technological giants? How and how much money do they earn each year? What did the arrival of Tim Cook and Satya Nadella at the controls of Apple and Microsoft respectively mean?

In this latest video of Si lo Habiera Sabido we tell you all the details.