Google wants to make photos Google Plus' killer app

Google is betting its algorithms can enhance your snapshots.

FORTUNE -- Most of us will never be Ansel Adams. But Google is betting that its algorithms can enhance our snapshots with the finesse of a darkroom pro.

On Wednesday, the company unveiled a set of improvements to the photo capabilities of Google+, its social network, that include the automatic refinishing of images. Using the same kind of machine learning algorithms it developed MORE

Jack Dorsey: 'We are optimizing for growth'

Square CEO Jack Dorsey spoke to Fortune exclusively about his company's new hardware, Stand, a $299 countertop point of sale system.

FORTUNE -- On Tuesday, fast growing mobile payments startup Square introduced Stand, a hardware device that cradles an iPad, turning it into a countertop point of sale system. Square CEO Jack Dorsey and Jesse Dorogusker, a former Apple (AAPL) exec who led the development of Stand, spoke with Fortune on Monday MORE

Square unveils Stand, a countertop point of sale system

The fast-growing payments startup is making an aggressive play for larger retailers.

FORTUNE -- Early last year, Square, Jack Dorsey's fast-growing mobile payments startup, made an unusual hire: Jesse Dorogusker, an Apple hardware executive who was responsible for docking stations, headphones, and other peripherals, joined as vice president of hardware. The move foreshadowed a foray into gadgets by Square, which is best known for its white plastic credit card reader for iOS MORE

Lenovo-IBM talks over server business break down

Valuation concerns have scuttled negotiations, according to a person familiar with the talks.

FORTUNE -- Negotiations between Lenovo and IBM over a multi-billion dollar deal under which Lenovo would acquire parts of IBM's server business have broken down, according to people familiar with the situation.

While the discussions could resume, they were halted over valuation concerns, according to a person familiar with the talks.

Spokespeople for Lenovo and IBM (IBM) declined to comment.

MORE: Nearly MORE

Silicon Valley venture backs Google Glass

Three of the Bay Area's marquee investment firms want to capture the most interesting ideas before they're hatched.

FORTUNE -- It was classic Sergey Brin. Dressed in sports shorts, an exercise shirt and blue Crocs, the Google co-founder showed up riding an elliptical bicycle, and as he does these days, wearing Glass, Google's futuristic wearable computer that fits on a head mounted display. Oh, and he was a few minutes late.

The MORE

Android: Facebook's new weapon against Google

Facebook's major announcement really amounts to one thing: The social network is using the search giant's own platform against it.

FORTUNE -- The last time Google and Facebook had a chance to make friends was October 2007, when the two companies discussed an advertising alliance. Ultimately, Facebook snubbed Google in favor of archrival Microsoft.

It's all been downhill since then. As Facebook (FB) grew to become an Internet superpower, it liberally poached MORE

Larry Page shuffles management, product groups at Google

Google appoints a new Android leader and shrinks its product groups from seven to five.

FORTUNE -- In my recent feature on Larry Page's successful tenure as CEO of Google, I noted that Page had presided over a remarkably stable management team.

That was then. In a matter of two days, Page shook up the "L-team" (short for Larry's team), shrinking Google's product groups to five from seven.

On Wednesday, Page announced that MORE

Ex-Square executive Keith Rabois joining Khosla Ventures

Keith Rabois says he had long considered becoming a professional investor. Now he will at Khosla Ventures.

FORTUNE -- Keith Rabois, who resigned from mobile payments startup Square last month amid accusations of sexual harassment, is joining Khosla Ventures.

As a senior investment professional at the firm, Rabois, a well-respected startup executive and successful angel investor, will help to select investments and to advise entrepreneurs in the firm's portfolio.

Vinod Khosla, the firm's founder, said MORE

Inside Google's ultrabook gambit

With a new laptop, Google is betting that living in the cloud on an ultrabook is not just cheaper, but much better.

FORTUNE -- Cloud computing has been around for some time now. But not many people believe they can do all their computing in the cloud. Not many, that is, outside the brainaics at the Googleplex.

With its line of Chromebooks made by various hardware partners, Google (GOOG) began testing in MORE

Square loses No. 2 exec amid sexual harassment accusations

A major shakeup at the hot mobile payments company.

Note: This is an updated version of a previous story.

FORTUNE -- Keith Rabois, the No. 2 executive at Square, the fast growing mobile payments startup, resigned from the company amid sexual harassment accusations made by an employee with whom he had an intimate relationship.

In a blog post, Rabois said that a New York-based attorney last week threatened him and Square with a MORE