We've got 5 copies to give to some lucky ITworld readers. Enter now for your chance to win!

We've got 5 signed copies to give to some lucky ITworld readers. Enter now for your chance to win!

We've got 5 copies to give to some lucky ITworld readers. Enter now for your chance to win!

Do you know a top-notch CIO or IT exec? Our sister site Computerworld is now accepting nominations for its 2014 Premier 100 IT Leaders awards.

We've got 5 copies to give to some lucky ITworld readers. Enter now for your chance to win!

We've got 5 copies to give to some lucky readers. Enter now for your chance to win!

We've got 5 to give to some lucky readers. Enter now for your chance to win!

ITworld is giving away 5 copies of "The Book of GIMP: A Complete Guide to Nearly Everything" to some lucky readers. Enter now for your chance to win!

ITworld is giving away 5 copies of "Ubuntu Unleashed 2013 Edition" to some lucky readers. Enter now for your chance to win!

ITworld is giving away 5 copies of 'Master Your Mac: Simple Ways to Tweak, Customize, and Secure OS X' to some lucky readers. Enter now for your chance to win!

ITworld is giving away 5 copies of 'Managing the Unmanageable: Rules, Tools, and Insights for Managing Software People and Teams' to some lucky readers. Enter now for your chance to win!