Warren Buffett joins Twitter

The 82-year old Berkshire Hathaway CEO tweeted for the first time Thursday morning during a discussion about women in leadership positions.

By Colleen Leahey, reporter

FORTUNE -- Berkshire Hathaway CEO Warren Buffett may have his hands in over 70 companies, but there's one frontier he has yet to traverse: Twitter. The Omaha, Nebraska-based investing guru, who doesn't have a computer in his office, joined the social media world this morning during a MORE

Is it legal to take a nap in your self-driving car?

And other mind-bending questions autonomous vehicles are already creating.

By Verne Kopytoff

FORTUNE -- Napping behind the wheel of Google's autonomous car while zooming down the highway is possible, theoretically. But is it legal? Who's liable if there's a crash? Will car owners need specific training?

California officials are trying to draft rules for autonomous vehicles, the futuristic cars that chauffeur passengers around town without a driver. The job is proving to MORE

An insider's view of AMD's war with Intel

Former CEO's book tells the story of one of the most aggressive lawsuits in corporate history -- to a point.

By Roger Parloff, senior editor

FORTUNE -- From 2004 to 2009, Advanced Micro Devices, the perpetual underdog semiconductor manufacturer, launched worldwide antitrust litigation against its much admired, much feared, near monopolist competitor, Intel. In submissions to competition authorities and courts, AMD charged that Intel was breaking the law to preserve its dominant MORE

Transcript: will.i.am, Bea Perez, and Dean Kamen at Brainstorm Green

Will.i.am, musician, entrepreneur and philanthropist, Bea Perez, chief sustainability officer, The Coca-Cola Company, and Dean Kamen, founder and president, DEKA Research and Development Company joined Fortune's Andy Serwer on stage at the Fortune Brainstorm Green conference to discuss design, innovation, and sustainability.

Below is an unedited transcript. The audio began in progress.

will.i.am:  (In progress) ‑‑  sit down and pitch it to you guys at Coca-Cola.  She never heard the idea, but she was open MORE

A winner in the light bulb wars

The use of light-emitting diodes is surging.

By Peter Suciu

FORTUNE -- Light-emitting diodes (LED) -- the same technology that now provides the backlight for many flat panel TVs -- will see its use double in the next year. The technology will replace fluorescent tubes in commercial applications, help make more efficient street lights with less light pollution, and most importantly could look cool in the process.

According to NPD DisplaySearch's latest MORE

NRG previews new Solar Canopy

At Fortune's Brainstorm Green conference, NRG Energy CEO David Crane unveiled a new product that provides shade and solar energy -- and it doesn't rely on rooftop panels or the electricity grid.

By Brian O'Keefe, assistant managing editor

FORTUNE -- If all goes according to plan for NRG Energy, solar power will soon be the hot new thing in shade.

At Fortune's Brainstorm Green conference this week, the power generation and utility company previewed MORE

Transcript: GM CEO Daniel Akerson at Brainstorm Green

General Motors CEO Daniel Akerson joined Fortune's Geoff Colvin on stage at the Fortune Brainstorm Green conference. He shared his perspective on the global auto industry, sustainable mobility and new products in the pipeline.

Below is an unedited transcript:

GEOFF COLVIN:  Thank you, Deb.  That was really enlightening, and I much appreciate it.  We all appreciate it.

General Motors has been through a lot in the last five years, and during that time not MORE

Transcript: General Mills CEO Kendall Powell at Brainstorm Green

General Mills CEO Kendall Powell joined Fortune's Marc Gunther on stage at the Fortune Brainstorm Green conference to discuss why sustainably growing and managing the global food supply is important.

Below is an unedited transcript. The audio began after the conversation was in progress.

MARC GUNTHER:  (In progress) -- value creation.  I wonder who made that up, but maybe you can tell us --

KENDALL POWELL:  Not me.

MARC GUNTHER:  You made it up, MORE

The biggest deterrent for women in tech

New survey results from job marketplace Elance.

By Kurt Wagner, reporter

FORTUNE -- A new survey by online job marketplace Elance found that men and women share similar opinions when it comes to women working in the tech industry. The results, which consisted of answers from close to 7,000 freelancers mainly in the U.S., found that both males and females agree on the top deterrents keeping women out of the tech industry, MORE

A different kind of environmental radical

Mark Tercek is transforming the Nature Conservancy by partnering with business.

By Brian Dumaine, senior editor-at-large

FORTUNE -- Mark Tercek, the head of the Nature Conservancy, America's largest environmental group, is not your usual green-minded crusader. As a former partner and head of corporate finance at Goldman Sachs, Tercek is someone who has lived in both worlds. While at Goldman, then-CEO Hank Paulson had asked him to head up the investment MORE