Dilbert mentions Open Source today. Or, rather, his boss mentions it "because it's free." Which it is, but it's the freedom to run, modify, and share software that's important.
In the Pointy-Haired Boss's office:
PHB: "From now on, I want you to use Open Source software for everything we do. It's free."
Dilbert: "I'll be right back."
At Alice's desk:
Dilbert: "It's an emergency. I think he's been reading."