2) What is an A B C Playlist? - The A B C playlist is the popularity of the song. So a popular artist like Lady Gaga if it fitted into the radio stations music format it would go straight into the A group. Whereas, a new artist would start off in group C to try and climb the ladder to group A. The more the song gets played and the more listeners that artist will more up groups.
3) What is "Music Scheduling?" - Music Scheduling is a program with loads of databases of songs. The program generates music playlists for the radio stations to play.
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5)The music scheduler uses techniques like playing popular songs in which most people would enjoy. For example playing top 40 songs in the charts of the most listened to songs.