The company had its origins in the 1988 formation of the American Mobile Satellite Corporation (AMSC), a consortium of several organizations originally dedicated to satellite broadcasting of telephone, fax, and data signals. XM channels were identified by Arbitron with the label "XM" (e.g., "XM32" for " The Bridge"). Its service included 73 different music channels, 39 news, sports, talk and entertainment channels, 21 regional traffic and weather channels, and 23 play-by-play sports channels. It provided pay-for-service radio, analogous to subscription cable television. XM Satellite Radio ( XM) was one of the three satellite radio ( SDARS) and online radio services in the United States and Canada, operated by Sirius XM Holdings. Merged with Sirius Satellite Radio in 2008, merged into Sirius XM Radio in 2011 For other uses, see XM (disambiguation) and XM 5 (disambiguation).
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