US
Microsoft co-founder says there could have been a single button to reboot Windows computers
He has also expressed interest in the expansion of engagements in other areas
Microsoft founder has some major restrictions on his kids when it comes to using smartphones and tablets
Bill Gates led the list for the fourth straight year
The company's profit and revenue have topped Wall Street's expectations
Gates leads on Forbes' list of the wealthiest individuals at $84.4 billion in net worth
World's eight richest as wealthy as half humanity, Oxfam tells Davos
He said he recently spoke to Trump by phone for the first time, saying they had 'a lot of common friends'
The fund seeks to finance emerging energy research and reduce global greenhouse gas emissions
Business tycoon set to handover business to daughter Marta Ortega