Twitter said Tuesday it was expanding its advertising program to mobile users, the latest bid by the short-messaging service to boost its money-making efforts.

The San Francisco-based company said users of Apple's iPhone and Android devices would begin seeing "Promoted Tweets" in their timelines in the coming weeks.

Spanish police arrested four suspected hackers of the subversive online movement Anonymous accused of sabotaging websites and publishing confidential data on the Internet, officials said Wednesday.

They are suspected of hacking political parties' and companies' websites and adding fangs to the faces of leaders in photographs online, and publishing data identifying top officials' security guards, police said in a statement.

Telepresence colossus Polycom is connecting secure workplace video-call systems with hot smartphones to stay in synch with a trend toward people using their own gadgets on the job.

Polycom RealPresence Mobile, which will be released in early March, will let business IT managers safely open in-house networks to high-definition video calls with laptops, tablets, or Apple iPhone 4S or Android 4.0 smartphones.

Mozilla, which brought the free web browser Firefox to the masses, now wants to do the same for mobile users, with a new open source operating system that could drastically slash smartphone prices.

Yahoo! has accused Facebook of infringing on 10 to 20 patents and warned the social network to pay licensing fees or prepare for a possible lawsuit, the New York Times reported.

The two companies discussed the matter on Monday, the Times said, citing unnamed individuals with knowledge of the matter.

Anonymous defended WikiLeaks when it was facing a funding cutoff, but the release of the Stratfor emails appears to be the first direct collaboration between the hackers and the anti-secrecy site.

WikiLeaks founder Julian Assange was coy about the source of the more than five million emails from the Texas-based private intelligence firm which his secret-spilling site began to publish on Monday.

Daniel Macias is the face of Silicon Valley seldom seen by those who don't live there.

When he was 19, he wasn't starting what would become one of the world's most successful tech companies, like Mark Zuckerberg did at that age when he founded Facebook. Macias spent his 19th birthday behind bars, where he'd been sentenced for assault.

Mobile phone giant Nokia on Monday looked to a launch in China to help it stage a comeback in the fiercely competitive smartphone market after a dismal 2011.

On the opening day of Mobile World Congress, where tens of thousands of executives from the industry have gathered, the phone maker said it would push its flagship Lumia smartphone series that run on the Windows platform to the Asian giant.

The battle between an ailing Chinese electronics maker and Apple Inc. over the iPad name is just as much a tale of obsolescence in the fast-moving global technology industry as it is a legal row over a trademark.

When businessman Rowell Yang Long-san launched his own iPAD-branded device in 2000, a decade before Apple unveiled its hit tablet, he declared it received an "overwhelming market response."

Russia's new Internet-savvy opposition is going online to protest and monitor the presidential elections on March 4, bringing its iPhones and Twitter into the fray against Vladimir Putin.

As jokes and spoof videos about Putin, expected to win back the presidency in Sunday's polls, spread like wildfire on social networking sites and YouTube, opposition activists are using the Internet to promote their cause.