Assertion: radio's use | /r/HasProperty | paging
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text: Uses for such subcarriers include radio reading services for the blind, which became common and remain so, private data transmission services (for example sending stock market information to stockbrokers or stolen credit card number blacklists to stores,[citation needed]) subscription commercial-free background music services for shops, paging ("beeper") services, non-native language programming, and providing a program feed for AM transmitters of AM/FM stations.