The TechZone has an article showing how we use Linux everyday and may not know it.

I like to tell Linux doubters I encounter that they in fact probably use Linux as part of their daily activities. As you can imagine, they want to see the proof. I thought I'd share with you my favorite examples of Linux playing an integral part of our society and show you how, in some shape or form, many of us rely on Linux every single day of our lives.

Who Says It's a Microsoft World?