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portable teligraphs
Find a summary, definition and facts about the First Telegraph for kids. The First ... The non electric telegraph was invented by Claude Chappe in 1794 using a visual system called .... The Civil War heralded the use of portable telegraph units. -
Telegraphs
Developed in the 1830s and 1840s by Samuel Morse (1791-1872) and other inventors, the telegraph revolutionized long-distance communication. It worked by transmitting electrical signals over a wire laid between stations. -
Hand written letters.
Case full of handwritten letters handwrittenletters.com ... According to the testimony of ancient historian Hellanicus the first recorded hand written letter (epistle) was by ... Egyptian papyrus made possible the ancient libraries of Alexandria and Pergamum. ... Prior to 1840 letters were delivered by courier, coach or horse rider. -
teliphones
Inventing the Telephone. “Mr. Watson, come here, I want you.” With these words, spoken by inventor Alexander Graham Bell into his experimental telephone on March 10, 1876, an industry was born. -
poorible radios
A transistor radio is a small portable radio receiver that uses transistor-based circuitry. Following their development in 1954, made possible by the invention of the transistor in 1947, they became the most popular electronic communication device in history, with billions manufactured during the 1960s and 1970s. -
hand radios
A transistor radio is a small portable radio receiver that uses transistor-based circuitry. Following their development in 1954, made possible by the invention of the transistor in 1947, they became the most popular electronic communication device in history, with billions manufactured during the 1960s and 1970s. -
portable phones
On April 3, 1973, Motorola employee Martin Cooper stood in midtown Manhattan and placed a call to the headquarters of Bell Labs in New Jersey -
email
According to Mr Ayyadurai, Mr Tomlinson's creation in 1971 was a primitive form of text messaging, while he had invented what we know as email in 1978 when he was a 14-year-old boy helping out the Newark dental school where his mother worked.Sep 5, 2014
