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A system like flag semaphore, with an alphabetic code, can certainly send any given message, but the system is designed for short-range communication between two persons. An engine order telegraph , used to send instructions from the bridge of a ship to the engine room, fails to meet both criteria; it has a limited distance and very simple ...
Telegram offers end-to-end encryption in voice and video calls, [10] and in optional private chats, which Telegram calls Secret Chats. Telegram also has social networking features, allowing users to post stories, create large public groups with up to 200,000 members, or share one-way updates to unlimited audiences in so-called channels. [11]
Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most widely used of a number of early messaging systems called telegraphs, that were devised to send text messages more quickly than physically carrying them.
Morse patented the system and tried to persuade Congress to adopt it as a government-owned and operated system like the post office. However, the Democrats in power were hostile to federal spending. In 1837, Morse obtained funding from Congress to build a telegraph line between Washington and Baltimore, a distance of about forty miles.
Transatlantic telegraph cables were undersea cables running under the Atlantic Ocean for telegraph communications. Telegraphy is an obsolete form of communication, and the cables have long since been decommissioned, but telephone and data are still carried on other transatlantic telecommunications cables.
The U.S. Securities and Exchange Commission (SEC) wants Telegram’s former chief investment advisor to testify and hand over documents related to the company's $1.7 billion 2018 token sale.
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A 2021 analysis of over 700 million communications logged by the Club Log blog, [18] and a similar review of data logged by the American Radio Relay League, [19] both show that wireless telegraphy is the 2nd most popular mode of amateur radio communication, accounting for nearly 20% of contacts.