Google and Facebook in bidding war over Waze travel app company

Search pioneer reportedly made approach after social network's $1bn offer was rebuffed, in move that could boost its maps app. By Charles Arthur

Yahoo’s $1.1bn Tumblr takeover is a bold roll of the dice

Jemima Kiss: CEO Marissa Meyer risks blowing the blogging platform's cool – but the deal could rejuvenate the tech giant's ad business

Yahoo in rumoured $1.1bn bid to buy white-hot Tumblr

Reports claim board has approved move to buy blogging platform site that could catapult Yahoo back into top flight web firms

Fresh questions for Amazon over pittance it pays in tax

Exclusive: Guardian investigation shows key role of British-based staff in pushing tax rulebook to its limits

Google’s Larry Page says Oracle among those holding back tech industry

Chief executive defends Google Glass and slams sector's 'negativity and zero-sum games' in speech to Google I/O

Windows 8 to be redesigned by Microsoft as PC sales plummet

Biggest expectation is that update will revive start button familiar to users for 17 years before removal from Windows 8

Shazam chief aims to drive revenues into ‘hundreds of millions’ ahead of IPO

Ex-Yahoo executive Rich Riley says service plans to capitalise on its 60 million monthly users as it lines up stock market listing. By Mark Sweney

Google’s Jared Cohen discusses the digital future – live Q&A

Jared Cohen, director of Google Ideas and co-author of The New Digital Age, went online to answer your questions

PC business slumps for fourth quarter in a row

Analyst says Microsoft's Windows 8 launch has 'slowed the market', as slide in shipments points to dramatic shift. By Charles Arthur

Amazon’s Jeff Bezos leads $5m investment in Business Insider

Chief executive Henry Blodget says Business Insider wants to 'emulate the customer-first success' of Amazon. By Jemima Kiss

Facebook set to make small-screen debut on Android smartphone

Social network's collaboration with HTC expected to customise functions ranging from camera to home screen

EA: where now for the games giant?

Keith Stuart: The Battlefield 4 publisher is looking for a permanent CEO – can they beat the new whiz-kids, or is the job a poisoned chalice?

Summly creator Nick D’Aloisio: ‘I try to maintain a level of humbleness’

Last week Nick D'Aloisio was a pretty average 17-year-old, with good mates, a girlfriend and £40 on his debit card. This week he sold his app for a reported £19m. Not that average, then