Preston GrallaContributing editor, PCWorld Follow me on Google+

Preston Gralla is a contributing editor for Computerworld, a blogger for ITworld, and the author of more than 45 books, including NOOK Tablet: The Missing Manual (O'Reilly 2012) and How the Internet Works (Que, 2006).

Enhance Firefox 4 with ten free add-ons

The recently released Firefox 4 is a big improvement over previous versions of the popular Web browser, but you can still teach it plenty of tricks.

Greenpeace: Facebook, others have a hand in global warming

Greenpeace has charged that Facebook, Apple, Microsoft, Google and others are contributing to global warming by using coal to power data centers for their cloud-based services.

Google, Microsoft and Apple: Which one will thrive?

As Apple, Google, and Microsoft look to encroach on the turf of the others, which one is best positioned for the future -- and which is most likely to fall? Computerworld's Preston Galla offers his take.