CES 2013: as big as ever, but is it out of date?

Expo's focus on hardware looks increasingly irrelevant as internet and software matter more and more, according to some observers

BuzzFeed announces $19.3m in funding as it transforms internet advertising

Heidi Moore: Adding serious journalism in between the cat pictures is paying off for Jonah Peretti's popular social site – and its advertisers

Jean Michel Jarre considers tax ‘defection’ to UK

French music star in talks with Downing Street over move to Tech City hub as France's highest earners rail against tax rises

Research in Motion loses a million subscribers as revenues fall 47%

BlackBerry maker's revenues of $2.7bn better than expected, but down nearly 50% compared to last year

Silicon Roundabout: Tech City to pioneer a radical new public space

Oliver Wainwright: Dismissed as a trophy project for David Cameron’s Big Society, a bold new plan by Architecture 00:/ aims to take the workspaces of the future to London’s East End

Groupon: from dotcom star to just another coupon business

A year ago, it was 'the fastest-growing company in the world'. Last week, the deals website's founder barely survived a bid to throw him off the board, writes Dominic Rushe

ICOA denies report of Google purchase after flurry of trades forces stock freeze

AP and other news outlets pick up hoax release from online PR company, leading to 3.321bn trades before sales are called off

Three shrugs off 4G with 1m new mobile phone customers

The UK's smallest mobile phone network becomes the fastest growing

Apple sells 3m iPad minis and latest iPad in three days

Sales only included Wi-Fi versions of devices, with 4G-enabled models going on sale later this month

Apple’s Tim Cook wages war on complacency

The razor-sharp CEO's latest firings are designed to leave no one in any doubt where he stands – or where the buck stops

Tech City: two years in, how is east London’s technology hub faring?

David Cameron launched his vision for a cluster of high-growth startups in the capital two years ago. Rohan Silva, the man responsible for implementing the initiative, tells James Silver about progress so far

Where Tech City still falls short

Technology insiders give their verdicts on Tech City's progress so far, and tell James Silver what the government needs to do next

iPad numbers fail to impress Wall Street analysts

Quarterly results beat Apple's own forecasts but Wall Street analysts had predicted higher profits

Microsoft Surface gets the thumbs down in early reviews

Writers praise the tablet's touchscreen and battery life, but criticise the lack of apps, its poor camera and its weight. By Juliette Garside

iPad mini launch: live coverage of the Apple event in San Jose

Charles Arthur: Full coverage as Apple reveals the price, size and other details of the iPad mini