What makes these tech billionaires stand out among aspiring technopreneurs? Some of these talented tech founders started their company while they were in college or after they left their previous jobs. They were involved in technology-based industries which continuously develop and re-invent both old and new products through a process of commercialization. Most of the companies owned and operated by these technocrats are located in Silicon Valley, San Francisco, California- a known hub for tech-centric startups and multinational companies. Their products include silicon chip technology, online stores, smartphones, mobile apps, and computer designs, among others. They devote most of their time building state-of-the-art technology such as software, mobile applications, and computer products. Some of these tech founders are often seen in tech expos, charity events and conventions as resource speakers. Most of the tech millionaires are software engineers, computer programmers, app developers, computer geeks, venture capitalists, business entrepreneurs, and angel investors. Some of them actually became millionaires at an early age of 20. From establishing a startup firm to a million dollar tech company, they are still highly involved in monitoring the daily operations. Through time, they were able to expand their market and production in several countries. They doled out from their earnings to their trust funds and charities. Some of them invested in small tech startups and other business. The creation of state-of-the-art technology has catapulted several names to the list of the world’s wealthiest personalities today. Some of the tech millionaires on our list include Houzz founder Adi Tatarko, Linux founder Linus Torvalds, and Apple co-founder Steve Wozniak. Get to know more about their humble beginnings below.