Top stories
-
Twitter files for IPO ahead of stock market launch
After years of speculation, Twitter has filed in private for an initial public offering, the first step towards going public
-
Dell takes $24.8bn buyout as tablets bite PCs
Buyout seen as way to refocus ailing computer manufacturer as popularity of tablets forces shift to corporate market. By Charles Arthur
-
Samsung wants a 64-bit phone – like Apple
Lack of 64-bit Android means that any Samsung smartphone would be constrained to run in 32-bit mode - and experts puzzle over benefit of 64-bit functions. By Charles Arthur
-
Xiaomi aims to be China's Apple - and Google
Google's outgoing mobile exec Hugo Barra explains how he was lured to growing Chinese smartphone firm Xiaomi. By Jemima Kiss
-
Three announces 4G rollout for 47 UK cities
London, Manchester and the Midlands get Three 4G this year, expanding to 98% of the population by the end of 2015. By Samuel Gibbs
-
Music piracy: number of tracks illegally downloaded in UK falls by a third
Ofcom says number of pirated tracks, from artists such as Adele and One Direction, fell to 199m from 301m in the past year. By Josh Halliday
-
Yahoo CEO Mayer: we faced jail if we revealed NSA surveillance secrets
Mark Zuckerberg joins Mayer in hitting back at critics of tech companies, saying US government did 'bad job' of balancing people's privacy and duty to protect. By Dominic Rushe
-
AVG gets into smartphone antivirus - and privacy
AVG promises to protect privacy as well as detecting malware – and claims that Android mobile devices are just as vulnerable as Windows PCs. By Tim Anderson
-
How can I move all my email to a different service?
Ask Jack: A reader has been using a btopenworld email address for the past decade, even after switching away from BT Broadband. Now BT wants £1.60 per month or it will delete his account, which is actually run by Yahoo. By Jack Schofield
-
30 most important moments in GTA history – part four
Daniel Dawkins: The penultimate batch of Grand Theft Auto memories, this time featuring Samuel L Jackson, biker gangs and Peter Moore's bicep
-
North Korea hackers suspected of attack on South
South Korea's ministry of unification and Seoul thinktanks targeted by rare spy program. By Josh Halliday and Samuel Gibbs
-
Would thieves really chop off your fingers to access iPhone?
Duncan Campbell: The newest phone from Apple uses fingerprint scanning security. If someone nabbed your iPhone, they would need your dabs to use it. Time to keep your phone – and hands – in your pocket?
-
iPhone 5S and 5C: 10 things you should know
For a start, both handsets will work on 4G, and the fingertip scanner can recognise up to five prints. By Juliette Garside
- iPhone launches gives China hang up over high price
- iPhone 5S: fingertip scanner is key
- iPhone 5S and iPhone 5C launch – as it happened
- Can you buy iPhone 5S or 5C with a clear conscience?
- iPhone 5S and iPhone 5C launch to 'brighten everyone's day'
- How would fingerprint technology benefit iPhone 5S users?
- iPhone maker accused of 'flouting' rights
-
Apple iPhone 5C and 5S – video review
Video (2min 53sec) The Guardian's technology editor Charles Arthur reports on the unveiling of two new iPhones from Germany's flagship Apple store in Berlin
