This small device receives messages or alerts using radio waves. What is the name of this device that is mostly outdated, but is still in use by doctors and emergency responders?

Pagers are small devices that receive messages or alerts using radio waves. Though they are not in popular use as of 2019, they were very popular in the 1980s and 90s, and are still in use by doctors and emergency responders. The first pagers were invented in the early 1920s.

Asked by Jason Forbes · Last updated 5 years ago · 4.6K views · SOURCE