3. Steve Jobs
Leaving Reed College in Portland, Oregon, six months after joining in 1972, the late Apple co-founder went on to transform one industry after another, from computers to smartphones to music.
4. Lawrence Ellison – Oracle Corporation
He left University of Illinois after his second year and is now ranked among one of the wealthiest people in the world. In 1966, aged 22, he moved to northern California to give shape to his hugely successful venture dealing in computer technologies, hardware systems and software products.