![]() ![]() From the 1980s, teleprinters were replaced by personal computers (PCs) running software to emulate teleprinters. The US military used radioteletype in the 1930s and expanded this usage during World War II. Commercial RTTY systems were in active service between San Francisco and Honolulu as early as April 1932 and between San Francisco and New York City by 1934. ![]() ![]() Later that year, the Radio Corporation of America successfully tested printing telegraphy via their Chatham, Massachusetts, radio station to the R.M.S. The US Navy Department successfully tested printing telegraphy between an airplane and ground radio station in 1922. Radioteletype evolved from earlier landline teleprinter operations that began in the mid-1800s. Radioteletype ( RTTY) is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations connected by radio rather than a wired link. ![]()
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