Internet music service Rdio.com on Tuesday unveiled a redesign intended to make it "faster, simpler and more social" as it battles with rivals such as Pandora and Spotify.

Rdio also announced that its music catalogue has grown to more than 15 million songs.

PayPal on Tuesday pulled out a revamped digital wallet service amid rumors it is poised to introduce a plug-in gizmo that will let small businesses accept credit card payments using smartphones.

PayPal digital "wallet" improvements to begin rolling out in May include the ability to make purchases at stores but decide days later which credit or debit cards will be used to pay.

The Encyclopedia Britannica will end print publication after 244 years and go "completely digital," the Chicago-based company said.

"The end of the print set is something we've foreseen for some time," Jorge Cauz, president of Encyclopedia Britannica, said in a statement.

The makers of an Instagram photo-sharing application wildly popular on Apple gadgets are tailoring a version for smartphones powered by Android software.

Instagram co-founder Kevin Systrom provided a glimpse of the Android "app" to technology trend-setters at a South By Southwest Interactive conference that wraps up on Tuesday in the Texas capitol of Austin.

Twitter on Monday announced that it has bought mobile blogging startup Posterous and will put engineers behind the popular "lifestreaming" service to work on special projects.

"This team has built an innovative product that makes sharing across the Web and mobile devices simple -- a goal we share," San Francisco-based Twitter said in a blog post.

Online porn venue Digital Playground was recovering on Monday after hackers looted credit card numbers, email addresses and other sensitive member information.

The members' area at digitalplayground.com was available after being out for several days but a message at the website said it was not taking new sign-ups for the time being.

Yahoo! filed suit against Facebook in a California court on Monday accusing the social networking giant of infringing on 10 patents held by the Internet pioneer.

Yahoo!, in a 19-page lawsuit filed in U.S. District Court for the Northern District of California, accused Facebook of infringing on patents in several areas including advertising, privacy and messaging.

Sri Lanka has imposed censorship on security-related mobile phone messages despite the withdrawal last year of tough emergency laws following the end of its separatist war with Tamil rebels.

The defense ministry's Media Centre for National Security (MCNS) in a directive to media organizations said they must get prior approval to publish SMS news alerts "related to national security and security forces."

Kurban Travel, a pioneering destination and travel expert with 60 years of proven track record in Lebanon, announced the official launch of its all new interactive web portal www.kurbantravel.com.

The website was designed as a comprehensive travel and tourism platform where customers can view and book their next dream holiday: the most attractive deals and the latest packages including flights, hotel reservations as well as car rental arrangements and cruise trips.

Hackers claiming to belong to the Anonymous Internet freedom group posted video messages on Facebook pages of Tunisian Islamists, threatening reprisals over their efforts to introduce Salafist laws.

"We are fighting you... your emails, your bank accounts and transactions will be probed, your hard discs will be copied," said a man wearing the Guy Fawkes mask that has become a trade mark of Anonymous members.