| 1800 | Italian Alessandro Volta invents the battery | 
| 1816 | Francis Ronalds demonstrates the first practical electric telegraph (no patent granted) | 
| 1830s | Samuel Morse and Alfred Vail invent Morse code | 
| 1837 | American Samuel Finley Breese Morse patents the electromagnetic telegraph | 
| 1837 | British team of Dr. William Fothergill Cooke and Professor Charles Wheatstone patent the first electric telegraph | 
| 1844 | Samuel Morse transmits first message: What hath God wrought! | 
| 1844 | Telegraph line from Baltimore to Washington completed | 
| 1846 | Telegraph line from Boston to New York completed | 
| 1847 | Telegraph line from Montreal to New York completed | 
| 1851 | Adoption of International Morse Code | 
| 1852 | Frederick Newton Gisborne lays the first underwater telegraph cable in North America linking New Brunswick and PEI | 
| 1861 | Telegraph line from east to west coast of US completed by Western Union Telegraph Company | 
| 1866 | Telegraph line completed in the Atlantic connecting Newfoundland and Valencia, Ireland | 
| 1876 | Alexander Graham Bell invents the telephone | 
| 1895 | Italian Guglielmo Marconi transmits first wireless message using Morse code | 
| 1900 | Canadian Reginald Fessenden transmits voice by radio | 
