What's Missing From This Sign at Airport Security?

Me (to the friendly TSA ID checker):  Do I have to remove my laptop computer?

TSA Employee: Yes, you do.

Me: It's not listed on the sign

TSA Employee: Well, it's the most important thing to remove.

Me: But not important enough to be on the sign?

TSA: It's supposed to be on there, the people that printed it messed up (rolls eyes).

The TSA folks have hard jobs and I appreciate what they do. However, it doesn't exactly give me a safe feeling when the instructions for moving through the line efficiently are "messed up" and no on seems to care.