Facebook IPO filing reveals mobile risks and opportunities
Stuart Dredge: Social network considering showing sponsored stories in mobile users' news feeds
Silicon London is first choice of base for Google, Facebook and other tech giants
The capital's young workforce and wealth of start-ups are behind last year's doubling in demand for office space for IT firms
Kazuo Hirai named new Sony CEO
Keith Stuart: The PlayStation boss will replace Howard Stringer at a crucial time for the consumer electronics giant
Amazon’s results disappoint despite strong Kindle performance
Revenues and net sales increase year-on-year, but profits fall 57% as online retailer pours money into online strategy
Could a BBM app save the BlackBerry?
Smartphone maker Research in Motion saw 7% wiped off its value after the departure of CEOs Mike Lazaridis and Jim Balsillie – but there's juice in the BlackBerry yet
Apple’s giant windfall: how will it be spent?
The creator of the iPhone may soon have more ready cash than the US government and analysts are speculating about acquisitions. But the firm may be more focused on a daring foray into pay television
Nintendo profits fall sharply as smartphones eat into console market
Games giant also warns of larger than expected full-year loss
Nokia puts brave face on 31% decline in sales as Windows smartphones launch
Chief executive Stephen Elop promises to break even in first three months of 2012 after posting €954m fourth-quarter loss. By Juliette Garside
Apple makes $13bn profit in three months
First quarter since death of Steve Jobs sees record revenue with 37m iPhones sold
BlackBerry creators pay price for failing to keep up with Apple
Research In Motion gets a new chief executive as Mike Lazaridis and Jim Balsillie step down from their roles
Yahoo: the rise and fall of an internet pioneer
Co-founder Jerry Yang has stepped down from the board, the company is undergoing a strategic review, competitors smell blood in the water – what next?
Microsoft’s Windows division suffers 6% drop in revenues
Competition from smartphones and tablet computers combined with floods at components factories have dented PC sales
Jerry Yang resigns from Yahoo
Jerry Yang, Yahoo's co-founder, has stepped down from his position on the company's board after 16 years. By Charles Arthur
CES 2012: Intel enters the lucrative smartphone market
Intel teams up with Lenovo and Motorola for the launch, later this year, of the K800, an atom-based smartphone. By Charles Arthur and agencies