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.

Secom security drone follows, photographs intruders

This Japanese security drone will chase down intruders

Security guards in Japan have a new tool to deter intruders: a flying security drone that will chase down and follow people without human intervention.

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Here's a look at Walmart Pay in action

On Thursday Walmart announced a payment system of its own that uses barcodes and it doesn't look too clumsy.

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FLIR to develop infrared cameras for DJI drones

Thermal imaging camera maker FLIR Systems has started working with drone maker DJI Technology on infrared cameras that can be attached to DJI's drones.

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Toyota's new Prius is one of first that talks to other cars

The new version of Toyota's best-selling Prius hybrid will come with technology that allows it to talk to other vehicles and things like traffic signals.

NASA Advanced Supercomputer Facility

NASA's not so keen to talk about quantum computer security

When NASA showed off its D-Wave 2X quantum computer on Tuesday, engineers were keen to talk about the computer's capabilities but less so about security measures that might be in place to stop hackers.

Yahoo Corporate

How Yahoo ignited the Web -- and then got burned

Over the years Yahoo has had its ups and downs and been criticized for falling behind the times -- but it remains in business, and one of the few web pioneers to successfully avoid bankruptcy or acquisition.

D-Wave 2X quantum computer

NASA, Google reveal quantum computing leap that leaves traditional PCs in the dust

In an experiment, a quantum computer outperformed a conventional machine by 100 million times.

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Five things you should know about drone regulations

There's a lot of confusion while the FAA works to come up with long-term regulations

Tesla Model

When your car has autopilot, will you be ready to take over?

Autopilot systems in cars are asking drivers to pay attention while not actually doing anything. Researchers say that's unrealistic and might create a new type of accident, but roads won't necessarily be less safe.

Toshiba HQ

Toshiba, Vaio, Fujitsu said to be considering laptop PC merger

Toshiba, Fujitsu and Vaio are considering a merger of their laptop PC businesses, according to a Japanese media report.

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Kill all germs! You can wash this Android smartphone with soap

Aiming to kill the thousands of germs that live on your smartphone and make some money from germophobes, Japan's Kyocera has developed a phone that can be washed with regular hand soap.

chip wafer

DARPA eyes faster design of military chips

The U.S. military's research division has kicked off a project to accelerate its design of custom chips, so the latest semiconductor technologies can be used more quickly in defense applications.

IPhone 6S launch in Palo Alto

Apple eyes OLED screens for the iPhone in 2018, report says

Apple is planning to introduce OLED screens to its iPhone, switching from current LCD technology to one that produces brighter, more vibrant and colorful images, according to a report.

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Hilton says malware targeted its credit card system

Hilton Worldwide says it has identified and removed malware that targeted card payment systems at some of its hotels over a 17-week period from late 2014 to mid 2015.

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Here's what all those strange emoji on your phone really mean

Few people know that emoji were created by NTT DoCoMo in 1999 for its I-mode service, and many still exist that refer to Japanese food, culture, society and holidays. Here's the story behind some key emoji.