Other most searched topics included the UK general election and the crypto-currency Bitcoin.
Silicon Valley giants are focusing heavily on artificial intelligence and its future applications.
Phone sales tumble at the retailer as consumers hold onto their handsets for longer.
Water bills in England and Wales will fall by between £15 and £25 a year from 2020 onwards, the regulator Ofwat says.
Earnings grew by 2.3% in the three months to October, falling behind inflation for an seventh month.