Charts for Singles/Hit SongsSingles/Hit Songs: Various song charts are referenced throughout the DMDB. Here are what the codes mean:

• A40: Billboard Adult Top 40 (1996-present)
• AA or AAA: Billboard adult alternative chart (1996-present)
• AC: Billboard adult contemporary chart (1961-present)
• AR: Billboard album rock chart (1981-present)
• AU: Australia’s pop chart (1966-present)
• CA or CB: Cashbox (1950-1996). U.S. sales-based chart
• CL: Classic Rock (1962-1981). Dave's Music Database book of pre-album rock songs.
• CN: Canada’s pop chart (1964-present)
• CO: College Rock (1965-1988). Dave's Music Database book of pre-alternative rock/modern rock songs.
• CW: Billboard country chart (1944-present)
• HP: Your Hit Parade (1931-1955), U.S. pop chart
• HR: Hit Records (1954-1982), U.S. pop chart
• MR: Billboard modern rock (or alternative rock) chart (1988-present)
• RB: Billboard R&B/rap chart (1942-present)
• RR: Radio & Records (1973-2015), U.S. pop chart
• UK: United Kingdom/British pop chart (1952-present)
• US or HT: Billboard pop chart (1890-present)

If a song is followed by --, then it was a non-charting single or was never released as a single, but has become a classic nonetheless.In addition, American radio airplay and worldwide sales figures are noted, in millions (ex: sales: 0.5 m, air: 0.4 m). See DMDB Links page under “Sales” and “Airplay” categories for sources.