It's no secret tech leaders wield a large influence when ranking the world's richest people

Eight of the top 20 billionaires in the world earned their wealth through the tech sector, according to Bloomberg's billionaires index

The tech billionaires on the list earned their fortunes through industries including automotive, online retail, software and social media

Eight tech billionaires in the top 20 plunged by $256 billion, roughly equal to the gross domestic product of New Zealand, based on World Bank data

Zuckerberg co-founded Facebook, which helped usher in the era of social media by connecting family, friends, and the occasional random person from high school

Ellison co-founded software giant Oracle in 1977 in Silicon Valley. Ten years later, it would go on to become the largest database management company

Ballmer served as CEO of Microsoft from 2000 to 2014, pushing its revenue toward $80 billion by the time he retired

Brin is one of the co-founders of Google, which has become an indispensable search and productivity tools for billions of people