Cooke and Wheatstone telegraph
The Cooke and Wheatstone telegraph was an early electrical telegraph system dating from the 1830s invented by English inventor William Fothergill Cooke and English scientist Charles Wheatstone. It was the first telegraph system to be put into commercial service. The receiver consisted of a number of needles which could be moved by electromagnetic coils to point to letters on a board. This feature was liked by early users who were unwilling to learn codes, and employers who did not want to invest in staff training.
Stock market data systems
In 1863 Edward A. Calahan of the American Telegraph Company invented a stock telegraph printing instrument which allowed data on stocks, bonds, and commodities to be sent directly from exchanges to broker offices around the country. It printed the data on wide paper tape wound on large reels. The sound it made while printing earned it the name "stock ticker". Other inventors improved on this device, and ultimately Thomas Edison patented a "universal stock ticker", selling over 5,000 in the late 19th century.