chief, pivotal, early 14c., from Latin cardinalis principal, chief, essential, from cardo (genitive cardinis) that on which something turns or depends; pole of the sky, originally door hinge, of unknown origin. Related: Cardinally. The cardinal points (1540s) are north, south, east, west.
Twenty years after the telephone was invented and music was first sent down a telephone line, Guglielmo Marconi sent radio signals. Marconi (1874-1937) was born in Italy and studied at the University of Bologna.he next year Marconi opened the first radio factory in Chelmsford, Essex and established a radio link between Britain and France. A link with the USA was established in 1901.
Some began subscription services in 1949. The â¦ concept was used for radio in mountainous areas of Europe since 1924. TV via Cable The first actual use of cable for television was in 1928 by John Logie Baird, famous as the inventor of television and colour television.