Radio and TV announcers broadcast it. Radio Engineers do it with Frequency Radio Engineers do it till it MegaHertz. Ranchers do it with cows and sheep. Real estate brokers do it on the ground. Real estate people know all the prime spots.
Receptionists do it in the vestibule.
Recyclers use it again. Reporters do it for the sensation it causes. Reporters do it daily. Researchers do it with control. Researchers are still looking for it.