This list highlights significant milestones and achievements based upon Billboard magazine's singles charts, most notably the Billboard Hot 100. This list spans from the issue dated January 1, 1955 to the present. The Billboard Hot 100 began with the issue dated August 9, 1958, and is currently the standard music popularity chart in the United States. All items listed below are from the Hot 100 era, unless otherwise noted (pre-Hot 100 charts).