Apple is expected to reveal a digital radio service and changes to the software behind iPhones and iPads on Monday as the company opens its annual conference for software developers.

Apple hasn't said what it will unveil at the Worldwide Developers Conference in San Francisco. But the major announcements are expected during Monday's keynote presentation. Last year, Apple used the conference to announce its own mapping service, better integration with social networks and improvements to virtual assistant Siri. It also announced thinner MacBooks with high-resolution screens. The conference runs through Friday.

It may not be able to carry the clubs like a caddie but a new "smart watch" can help a golfer find his range on the course, and its makers are taking a swing at the global market as part of a new trend in wearable computing.

The smart watch, on display at the Computex trade fair in Taipei, comes amid rumours of an Apple "iWatch" device to be worn on the wrist, and amid ongoing hype around Google's pioneering Glass.

Microsoft's upcoming Xbox One gaming console will be able to play used games, clearing up a worry among gamers and video game retailers such as GameStop, which trade in used games.

That means video games discs users buy will not be limited to one Xbox One device, and players can share or trade in the games they have bought for other used games, just as they have been able to do in the past.

Internet companies such as Apple, Facebook and Google have vast amounts of data on you.

These include the photos and video you share, the email you send and receive and the musings you broadcast to friends on what you are thinking or eating. Internet companies store all this information at data centers they run around the world. When you're ready to read your email, the message gets pulled from a computer at one of these centers. When you're sharing a photo, the image gets transmitted to one of these computers and stored there until someone else views it.

Google chief Larry Page and Facebook co-founder Mark Zuckerberg condemned online spying Friday and called for governments to be more revealing about snooping on the Internet.

"We understand that the U.S. and other governments need to take action to protect their citizens' safety -- including sometimes by using surveillance," Google chief and co-founder Larry Page said in a blog post.

Google chief Larry Page assured investors Thursday that privacy fears about the company's coming Internet glasses will fade as people incorporate the eyewear into their lives.

"People worry about all sorts of things that actually, when we use the product, it is not that big a concern," Page said while fielding questions at an annual shareholders meeting at the company headquarters in Silicon Valley.

Google says in a new study all the online searching and trailer-watching moviegoers do ahead of a film's release can have significant predictive powers at the box office.

The search company on Thursday published a "Quantifying Movie Magic" study that surveyed 99 of the top-grossing films of last year. Google says that four weeks before a film is released, search volume for its trailer can predict its opening box office with 94 percent accuracy when factoring in its status and the time of year.

Apple attorneys in the U.S. antitrust case on e-books went on the offensive Thursday, attacking the credibility of government witnesses and seeking to debunk key elements of the government's case.

Apple attorneys grilled a trio of witnesses from Apple rival Amazon and undertook a bruising cross-examination of a Google executive.

Taiwan's computer manufacturer Asus unveiled a mobile device Wednesday that it described as the world's first three-in-one tablet, laptop and desktop computer.

The Transformer Book Trio, shown off at the Computex Taipei IT trade show, is powered by Intel's new fourth-generation processors and runs both Windows and Android operating systems.

Finger fatigue after hours of video gaming may become a thing of the past, as firms unveil headsets that measures users' brainwaves and allow them to interact with apps installed in computers.

The new technology is part of a wider exhibition of wearable computing, the next great frontier in consumer electronics, on display at Taipei's Computex trade fair.