I was flying out of SJC the other day and had two carry-ons. My backpack with laptop and a shoulder bag with projector. I took out the laptop and ran it through separately, but I left the projector in the shoulder bag. A screener pulled it off the belt after the x-ray machine and did a secondary search...no problem. The following ensued:
She-TSA: Why didn't you remove this from your bag and run it through separately?
Me: Because it isn't a computer...
She-TSA looking confused: But this is a computer...
Me wondering if she is serious: Actually, it's a projector. It attaches to my computer which I did run through separately...
She-TSA then went to confer with her fellow screeners. Seriously five minutes later, she came back with another screener and they discussed whether it was a computer or not right in front of me at the luggage table He-TSA told She-TSA that I was right and that the projector was in fact a projector and not a computer. She-TSA then swabbed it and gave it back to me with this warning...
"This is a computer according to the TSA and next time, you need to run this through separately."
...let the TSA-supporters flaming begin.