2. Tim Cook

The fact not much known to others is about Tim Cook's first paying job on delivering newspapers in his Alabama hometown.

Cook has also worked at a paper mill in Alabama and an aluminum plant in Virginia before getting into the tech space, as he said on stage at Goldman Sachs Technology and Internet Conference in 2012. His first job in the technology industry came when he worked at IBM for 12 years just before he started at Apple.

3. Seregy Brin

Google co-founder Sergey Brin may be one of the biggest names in today's tech industry, but that wasn't always the case. In fact, like many of us, his resume looked fairly plain and basic back in the early 1990s.

Before Sergey Brin cofounded one of the most important tech companies in the world, he worked at Wolfram Research. According to an early version of his resume from 1996, he worked as a coder.