These are the 10 richest people in the world

1. Bill Gates

Net worth- $89.8 billion

In 1975, Gates and Paul Allen launched Microsoft, which became the world's largest PC software company. He stepped down as chairman of Microsoft in February 2014. Gates is one of the best-known entrepreneurs of the personal computer revolution. Since 1987, Gates has been included in the Forbes list of the world's wealthiest people.

2. Jeff Bezos

Net worth- $86.7 billion

Jeff Bezos is the founder, chairman, and Chief Executive Officer of Amazon.com, the world's largest online shopping retailer. He is the second-richest man in the world. On July 27th, after earnings expectations skyrocketed Amazon stock, Bezos briefly dethroned longtime richest-guy-ever Bill Gates with an estimated wealth of $92 billion.

3. Amancio Ortega

Net worth- $84.1 billion

Amancio Ortega is the founder and former chairman of Inditex fashion group, best known for its chain of Zara clothing and accessories retail shops. According to Forbes Magazine, he is currently (2017) the richest person in Europe, and the third richest in the world. He is also the wealthiest retailer in the world.

4. Warren Buffett

Net worth- $74.8 billion

Known as the "Oracle of Omaha," Buffett is one of the most successful investors of all time. Buffett has been the chairman and largest shareholder of Berkshire Hathaway since 1970. His Berkshire Hathaway owns more than 60 companies, including Geico, Duracell and Dairy Queen. With friend Bill Gates, he launched The Giving Pledge, asking billionaires to donate their wealth.

5. Mark Zuckerberg

Net worth- $71.8 billion

Mark Zuckerberg is the co-founder, Chairman and CEO of Facebook. A Harvard dropout, he founded Facebook in 2004 at the age of 19. He is ranked by Forbes as the fifth richest person in the world. Zuckerberg and his wife, Priscilla Chan, have pledged to give away 99% of their Facebook stake over their lifetimes.

6. Carlos Slim Helu

Net worth- $69.2 billion

Mexico's richest man, Carlos Slim and his family owns America Movil, Latin America's biggest mobile telecom firm. He also owns stakes in Mexican construction, consumer goods, mining and real estate companies and 17% of The New York Times. He is ranked by Forbes as the sixth richest person in the world.

7. Larry Ellison

Net worth- $61.1 billion

Larry Ellison co-founded software firm Oracle in 1977 to tap into the growing need for customer relationship management databases. While he gave up the CEO role in 2014, Ellison is still involved at Oracle as chairman and chief technology officer. In 2016 he pledged $200 million to the University of Southern California for a cancer treatment center. He is ranked as the seventh richest person in the world by Forbes.

8. Bernard Arnault

Net worth- $53.5 billion

Arnault is the Chairman and Chief Executive Officer of LVMH, the world's largest luxury goods company. Arnault oversees an empire of 70 brands including Dom Perignon, Bulgari, Louis Vuitton, Sephora and Tag Heuer. He is the richest person in France, and the 8th richest person in the world according to Forbes. LVMH is now working with the City of Paris to create another major new cultural institution that will be dedicated to artists and live performances.

9. Michael Bloomberg

Net worth- $53 billion

Bloomberg cofounded financial information and media company Bloomberg LP in 1981. He owns at least six homes, including ones in Bermuda and London. He is the ninth richest person in the world.

10.  David Koch and Charles Koch

Net worth- $48.6 billion each

Charles Koch has been chairman and CEO of Koch Industries, America's second largest private company, since 1967, while his brother David Koch serves as Executive Vice President. Charles and David each own 42% of the conglomerate.