He started the company with Paul Allen in 1975.

Bill Gates quits Microsoft board to spend more time on philanthropy

Melinda Gates has thrown her powerful voice behind those condemning Donald Trump's attack on four congresswomen as racist.

Ask A Woman: Melinda Gates on Donald Trump racism and 'senseless' anti-vaxxers

Mr Allen co-founded Microsoft with his childhood friend Bill Gates.

The UK is leading the global push to eliminate polio around the world for good, with the Government pledging £100m to tackle the disease.

Bill Gates has told ITV News that Britain must stick to its overseas aid budget amid speculation Theresa May could drop the commitment.

The American business magnate and philanthropist writes for ITV News on why aid is so important. 

International Development Secretary Priti Patel said the diseases 'belong to the last century'.

The Microsoft founder warned terrorists could create contagious and deadly strains of diseases capable of killing tens of thousands. 

The world's richest eight people have as much wealth as 3.6bn people making up the poorest half of the planet, according to an Oxfam study.

The philanthropist said the Zika and Ebola outbreaks have exposed serious weaknesses in the global response to health crises.

The world's top scientists have called for a ban on autonomous weapons and "killer robots" that can attack targets without human control.

Forbes magazine's annual ranking of the world's billionaires puts the technology entrepreneur ahead of Mexican businessman Carlos Slim.

Bill Gates accepted the challenge from Mark Zuckerberg to do the viral ice bucket challenge. And he did it in style.

Facebook founder Mark Zuckerberg has poured iced water over his head in the latest online craze and nominated Bill Gates to do the same.

It took just 79 seconds for the newly-crowned world chess champion Magnus Carlsen to checkmate Microsoft magnate Bill Gates on a chat show.