Adult standards is a North American radio format heard primarily on AM or class A FM stations. Adult standards (also sometimes known as the nostalgia format) is aimed at "mature" adults, meaning mainly those persons over 50 years of age, but it is mostly targeted for senior citizens. It is primarily on AM because market research reveals that only persons in that age group listen to music on AM in sizable numbers. Adult standards first became a popular format in the late 1970s and early 1980s as a way to reach mature adults who came of age before the rock era but were perhaps too mature for adult contemporary radio or too young for beautiful music. A typical adult standards playlist includes popular music standards by artists such as Frank Sinatra and Tony Bennett, some easy listening numbe