"Bezos showed intense and varied scientific interests at an early age. He rigged an electric alarm to keep his younger siblings out of his room and maintain his privacy. He converted his parents' garage into a laboratory for his science projects. [...] While in high school, he attended the Student Science Training Program at the University of Florida.... He entered Princeton University, planning to study physics, but soon returned to his love of computers and graduated summa cum laude, Phi Beta Kappa with a degree in computer science and electrical engineering."
His first set of jobs were also in CS, networking, etc.
I think it's no accident that Amazon is the leading cloud computing provider.
Atleast thats what I know from the recent Mixergy podcast