Facebook on Tuesday said it has bought an innovative young startup devoted to re-imagining electronic books.

Facebook planned to incorporate Push Pop Press technology into the world's leading online social network and said it does not intend to get into the digital book business.

Over 70 organizations including the United Nations and major U.S. defense groups have been targets of a global cyber spying effort, according to security firm McAfee, with analysts pointing to China as the culprit, the Washington Post said Wednesday.

Targets for the intrusions -- identified from logs tracked to a single server -- included computer networks of the United Nations secretariat, a U.S. Energy Department lab, and some dozen U.S. defense firms, said the McAfee report to be released Wednesday, according to the Post.

Internet company AOL is trying to snatch a larger portion of the tablet computer audience by launching free iPad software that presents a customized, daily e-magazine that draws in content from all over the Web.

Called Editions, the software is similar to news-aggregating mobile apps such as Flipboard and Pulse, but more focused on bringing users a finite, tailored amount of content that updates once per day. AOL's app is being released Wednesday.

Nissan's Leaf electric car can feed power from its battery back into a family home and run appliances for up to two days under a new project the Japanese car-maker unveiled Tuesday.

Using the "Leaf to Home" system, the lithium-ion batteries of the zero tailpipe emission Leaf can be used as an emergency power backup for the home during a natural disaster or a power blackout, Nissan said.

Twitter announced on Monday it has closed a deal for a "significant" round of new funding led by Russian investment company Digital Sky Technologies (DST).

Twitter did not reveal the amount raised for the wildly popular real-time micro-blogging service but the technology blog All Things Digital reported last month that the deal would be worth $800 million and value the company at $8 billion.

Google, which is offering an online bargain service in three US cities, has acquired The Dealmap, a company that aggregates local deals.

"We are impressed with what The Dealmap team has accomplished and excited to welcome them to Google," a Google spokeswoman said in a statement.

Australia's government plans to post video on YouTube and Facebook of the first group of asylum seekers sent to Malaysia under a pact between the countries to swap refugees, in an attempt to deter others from taking dangerous boat journeys to Australia.

Releasing video of the asylum seekers at Christmas Island — an Australian territory in the Indian Ocean — boarding a plane, and arriving in Malaysia will help raise awareness of Australia's new policy, Immigration Minister Chris Bowen said Tuesday.

The German industrial group Siemens said Monday it will form a joint venture focused on gas turbines with the Russian firm Power Machines, as Siemens moves away from nuclear energy activities.

A Siemens statement said it would own 65 percent of a joint entity, and would in exchange give back a stake of 25 percent plus one share that it owns in Power Machines to the firm's dominant shareholder, Highstat.

Tucked away in a small warehouse on a dead-end street, an Internet pioneer is building a bunker to protect an endangered species: the printed word.

Brewster Kahle, 50, founded the nonprofit Internet Archive in 1996 to save a copy of every Web page ever posted. Now the MIT-trained computer scientist and entrepreneur is expanding his effort to safeguard and share knowledge by trying to preserve a physical copy of every book ever published.

Digital music service Spotify, which recently arrived in the U.S., has been sued by music and video streaming software maker PacketVideo for allegedly violating a patent it holds for digital music distribution.

In court documents filed this week in U.S. District Court in the Southern District of California, PacketVideo said it believes Spotify's free and paid music-streaming service violates its patent for a "device for the distribution of music in digital form." The patent covers methods for streaming copyright-protected music from a central device over data networks.