These are flight strips -- they go into a stack that help the controller know what planes he is working and usually include the destination, the flight time, th

These are flight strips -- they go into a stack that help the controller know what planes he is working and usually include the destination, the flight time, the type of aircraft, and a few other things. https://www.faa.gov/air_traffic/technology/tfdm/efs/ https://www.faa.gov/air_traffic/technology/tfdm/efs/ -- a program to replace the paper strips with electronic ones.