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The CHR/Pop chart was used for Westwood One's "Casey's Top 40" (January 1989 – March 1998) and Premiere Networks' American Top 40 (March 1998 – October 2000, and August 2001 – January 2004). The current Ryan Seacrest AT40 show uses Mediabase 24/7. The Hot AC chart was used for both Casey's Hot 20 and the Hot AC version of American Top 20.
On the Hot AC version of AT40, "Use Somebody" by Kings of Leon set the all-time record in 2011 at 117 consecutive weeks. American Top 40 also became more interactive, involving online song voting and e-mail. In December 2006, the series' website was revamped, and the online song voting was discontinued in favor of publishing the Hot AC chart.
During the 1960s and 1970s, Billboard continued to collect airplay data as a component of the Hot 100 but did not make the chart public. [3] The airplay-only chart debuted as a 30-position chart on October 20, 1984, and was expanded to 40 positions on May 31, 1986. [4] Rankings were based on playlists received by a panel of Top 40 radio stations.
Mediabase is a music industry service that monitors radio station airplay in 180 US and Canadian markets. Mediabase publishes music charts and data based on the most played songs on terrestrial and satellite radio, and provides in-depth analytical tools for radio and record industry professionals.
Heating appliances that use steam or hot water as the fluid are normally referred to as a residential steam boilers or residential hot water boilers. The most common fuel source for modern furnaces in North America and much of Europe is natural gas ; other common fuel sources include LPG (liquefied petroleum gas), fuel oil , wood and in rare ...
Adult Contemporary is a chart published by Billboard ranking the top-performing songs in the United States in the adult contemporary music (AC) market. In 1996, five different songs topped the chart in 52 issues of the magazine, based on weekly airplay data from radio stations compiled by Nielsen Broadcast Data Systems .
CCM AC chart was an adult contemporary chart that was originally started by CCM Magazine in 1978. According to author Jeffrey Lee Brothers in his book Hot Hits: AC Charts 1978 – 2001, "When CCM published music charts, it received data from a specific number of radio stations regarding the number of times a song was played.
A register is a grille with moving parts, capable of being opened and closed and the air flow directed, which is part of a building's heating, ventilation, and air conditioning (HVAC) system. The placement and size of registers is critical to HVAC efficiency. Register dampers are also important, and can serve a safety function.