Martyn WilliamsSenior U.S. Correspondent, IDG News Service

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Martyn Williams covers Silicon Valley and general technology breaking news for the IDG News Service, and is based in San Francisco.

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The massive Yahoo hack ranks as the world's biggest -- so far

When Yahoo said on Thursday that data from at least 500 million user accounts had been hacked, it wasn't just admitting to a huge failing in data security -- it was admitting to the biggest hack the world has ever seen.

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Self-driving Ubers are now arriving in Pittsburgh

Uber has begun offering customers the chance to ride in one of its autonomous car prototypes. The new service has launched in Pittsburgh, where Uber carries out its high-tech research, and is a sign of confidence by the company in its self-driving car technology.

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Apple reportedly will add Sony's Felica RFID to iPhone 7

Apple will add support for Sony's Felica RFID communications technology to the new iPhone 7 that is expected to be announced on Wednesday, according to a report in The Nikkei newspaper.

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LG's smart fridge has Windows 10 on a transparent display

In the short history of Internet-connected refrigerators, LG's latest is the boldest and craziest yet. The company has put a 29-inch Windows 10 Surface computer on one of the doors and, as if that's not enough, made the screen transparent so users can see inside the fridge.

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Sony previews prototype Xperia gadgets

Sony is looking at taking the Xperia brand beyond smartphones and is showing off some prototype gadgets at the IFA trade show in Berlin.

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Samsung recalls Note 7 on battery fire reports

Samsung is halting sales of its recently-launched flagship Note 7 smartphone and recalling phones of this model sold worldwide after reports of several units catching fire due to battery problems.

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DJI's handheld gimbal promises cinematic images from smartphones

DJI says smartphone users will be able to shoot smoother, more cinematic video with a new handheld gadget that packs video stabilization technology used on the company's drones.

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Sony's $3,200 golden Walkman sounds like listening to a private concert

If you're a music lover who still isn't satisfied with the audio from your smartphone, Sony has a couple of new Walkmans that might be just what you're looking for -- assuming you have deep pockets.

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Stay tuned for new robot, says Sony CEO

Sony's much anticipated new robot is under development and customers should hang on a little longer to see it, CEO Kaz Hirai said on Thursday.

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Panasonic's new 4K camcorder does better in low light

Panasonic will soon introduce a prosumer 4K camcorder with better low-light performance, faster autofocus and a wider viewing angle than its predecessor.

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Acer's Pawbo gadgets will let you play with your pets when you're away from home

In the battle to sell more stuff to consumers, Acer has a new target: your pets.

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Cisco to shed 5,500 staff in refocus on IoT, security, and cloud

Cisco Systems plans to lay off about 7 percent of its global workforce in a restructuring that will see it further focus on hot IT areas such as the Internet of things, security, collaboration, next-generation data centers and the cloud.

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Riding Modobag, the motorized suitcase

The Modobag is a motorized suitcase you can ride around an airport. It's impressively built, handles great and appears sturdy, but is it really needed?

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The US Marines are testing a pocket-sized helicopter drone

The U.S. Marine Corps is testing a pocket-sized drone that can deliver live video feeds from three cameras and is small enough that it's almost invisible from the ground.

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Hackers hit Oracle's Micros payment systems division

Russian cybercriminals have infiltrated systems at Micros, an Oracle division that is one of the world's biggest vendors of point of sale payment systems for shops and restaurants, according to an influential security blogger.