Microsoft's Windows XP lost a big chunk of usage share last month as users continued to desert the aging operating system for Windows 7.

Membership for up and coming social network Google Plus has accelerated over the holiday period, with 625,000 new users being added a day and an overall total of 62 million, a researcher has estimated.

The New Year is finally here - and with it comes the realisation that you probably had one too many pieces of pie at that last holiday party. Whether you want to work off just a few holiday pounds or you've made a New Year’s resolution to get in shape, you can find tons of fitness tools online and on your mobile phone that will provide motivation and assistance. Here are ten great tools that will help you track what you eat, where you run, and how quickly you’ve lost weight.

Mozilla's upgrade call last month pushed more Firefox 3.6 users to grab a newer edition than any month since June 2011, a Web metrics company said over the weekend.

Yahoo has appointed a new CEO: Scott Thompson, president of PayPal. The move ends a four-month search after Carol Bartz was fired in early September.

Google has acquired more IBM patents, adding more than 200 to approximately 2,000 patents it had previously bought from IBM.

IT departments are missing out on potentially significant power consumption savings due to fears that PC power management (PCPM) solutions could disrupt core IT operations, according to analyst firm Ovum.

If you’ve already created accounts for your business on major social media sites, then you know it can be incredibly time consuming to manage all of them. Sending out messages to Facebook, Twitter, and LinkedIn takes an extra minute or two for each message. While that isn’t much at first, when you’re trying to send out dozens of messages a day it multiplies quickly. Luckily, you can quickly and easily tie these services together to send messages to more than one service at a time.

IBM is buying Green Hat, maker of automated testing tools for integration, SOA (service oriented architecture) implementations and cloud-based deployments, the company announced on Wednesday. Terms of the deal were not provided.

It's a stretch to call 2011 a truly transformative year for enterprise software, given all the old warts that remain, from large-scale IT project failures to creaky legacy systems that will take years and great expense to replace with the latest-and-greatest.