Signal (subscription service)

From Biocrawler, the free encyclopedia.

Signal was a subscription-based service founded by Data Broadcasting Corporation (DBC) that provided real-time stock quotes to the subscriber to their computer.

It was originally distributed via the subcarrier of an FM radio station as data to a special receiver connected to a computer. Signal's data was also alternately distributed via the VBI of the video of several popular cable & satellite tv channels, such as C-SPAN and WGN, which was received by a special receiver connected to a computer as well that read the data in the VBI.

Signal was discontinued by DBC for eSignal, essentially the same service, but distributed via the Internet instead.

External Links

• eSignal's web site (http://www.esignal.com)

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Signal_(subscription_service) (http://en.wikipedia.org/wiki/Signal_(subscription_service)) version history (http://en.wikipedia.org/w/index.php?title=Signal_(subscription_service)&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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