I am sitting in a meeting room at the San Francisco offices of Twitter, chatting with the fast-growing startup's 31-year-old CEO, Jack Dorsey, when a wave of déjà vu washes over me. The youthful vibe, the playful decor, the funky South of Market loft space - I've been here before. In 2005, Mark Zuckerberg earnestly explained to me the importance of Facebook as we sat in his similarly appointed office in Palo Alto. Chad Hurley and Steve Chen walked me through YouTube's growth story the following year in their cramped space above a San Mateo, Calif., pizza parlor.

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Dell is announcing Wednesday that it has become carbon neutral by turning out the lights in its offices, buying wind power and protecting endangered forests in Madagascar.

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As Cisco gets set to deliver another solid quarterly performance, investors are bracing for a less-than-dazzling outlook.

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Apple watchers are abuzz over the prospect of a smaller, cheaper iPhone by Christmas. Don't hold your breath.

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This is my farewell column. Fast Forward has been a weekly labor of love, mostly, since early 2002. Now I'm taking an extended leave from Fortune to write my book, The Facebook Effect.

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Carl Icahn's breakup strategy for Motorola has some cracks in it.

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With a cast of defiant board members, angry shareholders and a billionaire investor ready to make trouble, Yahoo's annual shareholder meeting Friday was once the hottest ticket in Silicon Valley.

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Internet search giant plans to set up a venture capital arm, a move that other tech giants have tried without limited success.

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It was easy to scoff two years ago when word leaked out that Amazon was launching its own digital music service. The Seattle-based online retailer wasn't just mulling an iTunes-like download store - it was supposedly drawing up plans for a branded iPod-like device.

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Korset, a new open-source system, aims to prevent worms and viruses from entering computers.Read more

Steve Jobs' minions pull a trio of iPhone apps, creating an opening for the Finnish handset maker.Read more

The billionaire is set to take a trip into space, but he's still focused on making videogames better on Earth.Read more

Companies are using digital games to train young employees.Read more

The Web portal's vote count snafu shows that stockholders are angry. But how much does it matter?Read more

Digital goods--and pets--are coming to Apple's blockbuster device.Read more

The chip giant is focusing on wireless devices and its own $100 laptop.Read more

New federal initiative aims to create ''net-zero energy'' commercial structures.Read more

Microsoft's latest partner could kick off big changes for its consoleRead more

TomTom and Garmin are expanding into car dashboards and mobile phones to stay competitive.Read more

The chip giant's not-so-secret plan is to use desktop processors to conquer the graphics market.Read more

Sanjay Jha discusses how he will turn around the company's ailing handset unit.Read more

Segway and other greentech marvels are getting attention again. But can they replace the suburbs' love affair with gasoline?Read more