How to Make Sure No One Bothers You in a Computer Lab

You have a lot of work to do. You're on a deadline. You're stressing out because people are constantly dropping by your desk saying hi, how you're doing because you're in a computer lab. You need to block everybody out. What do you do? Slap on some headphones and tape this sign onto your back. That should do the trick. You can work without any interruption now. More