While cleaning out my archives last week, I ran across the backpack I received when I attended the Microsoft Dynamics Convergence show in Dallas last March.  Inside, I found this:

Betcha can't guess what it is.
Well, it would appear I had placed some lunch left-overs into my backpack with the intent of finishing them off [...]

This is the universal symbol for "Don't let your kids play with the plastic bag that the computer was shipped in."  At least according to Compaq Computer.