What does a leaker look like? Sometimes, people who reveal secrets remain in the shadows, and the public is left to guess at their motivations, agendas and states of mind. Edward Snowden, the 29-year-old man behind the recent revelations about the National Security Agency’s pursuit of phone and computer data, upended that history. He is a new kind of leaker of the wired age: an immediately visible one with a voice and the means to go direct with the public.

The company introduced a major redesign of iOS, its mobile software system, as well as upgrades for some Mac computers.

The Internet companies that cooperated with national security officials include Google; Microsoft, which owns Hotmail and Skype; Yahoo; Facebook; AOL; Apple; and others.

When defects are discovered, confidentiality agreements keep the manufacturer’s identity secret, making accountability difficult.

NetSuite and Workday are poised to cash in on the migration to cloud computing services and perhaps elbow aside today’s corporate software giants.

A law school professor is on a permanent campaign to argue that the telecom and cable industry has been overtaken by monopolists who resist innovation and overcharge consumers.

Bland New Jersey buildings are commanding rents four times as high as Class A high-rises in Manhattan, but it isn’t the space that attracts. It’s the electrical capacity.

Facebook is in serious discussions to buy a leading mobile navigation service, Waze, according to two people with knowledge of the situation. If the sale is concluded, it would give Facebook the ability to better deliver locally tailored ads and content to its 1.1 billion users. The potential purchase price, which some news reports have said could run as high as $1 billion, would rival what Facebook paid last year to buy Instagram, a fast-growing mobile photo-sharing service.

Google Glass, a wearable computer not yet formally released, is raising questions about whether it will distract drivers, upend relationships and strip people of what little privacy they still have in public.

Intel named Brian M. Krzanich to succeed Paul S. Otellini as chief executive, and appointed Renee J. James as its president.

After a Twitter hoax caused the Dow to drop temporarily by 150 points, regulators are increasingly concerned about the combination of social media and high-frequency trading.

Hotels around the world are using technology in new ways, with the goal of speeding up or personalizing more services for guests.

In the emerging field of work-force science, companies are using data analysis to help find and nurture successful employees.

Europe relies heavily on imported coal and natural gas, while green power sources require subsidies that are passed on to industry and consumers.

Facebook does not have to build a phone, as its chief executive, Mark Zuckerberg, has long maintained. But it needs to find a way to play a bigger role in delivering what consumers want from their phones: ways to communicate, find answers to questions, shop and be entertained. The company would especially like to become that workhorse for the vast majority of its users who live outside the United States and from whom, so far, it barely profits.

Box, a business data storage and management company, is expanding as part of plans for an expected initial public offering in 2014.

Europe and the United States are operating at far different speeds with respect to data privacy regulation. And that could be a stumbling block in future trade talks.

The dawn of mainframe computers offered huge technological benefits, but also challenged notions of privacy. Now Big Data is bringing similar expectations and concerns.

Lockheed Martin is on track to use quantum computing to solve some science and business problems millions of times faster than can be done today.

Who would have thought the United States would one day be a leader in cutting greenhouse gas emissions? This is the nation, after all, where a former chairman of the Senate committee on the environment, James Inhofe, wrote a book about global warming called “The Greatest Hoax.” This is where a presidential election took place not six months ago in which climate change barely merited a mention, buried under an avalanche of promises to dig for coal and drill for oil.

Across the country, cities are showing a renewed interest in taking over the electricity business from private utilities, reflecting intensifying concerns about climate change, responses to power disruptions and a desire to pump more renewable energy into the grid.

Google is expanding its office space and hiring engineers in the Seattle area to compete with rivals in the lucrative cloud computing business.

While scientists race to develop a technology, probably nuclear-based, that can slake our energy thirst without a huge environmental cost, it would be folly to wait that long to tackle carbon emissions.