1878 ⟶ First Commercial Telephone Exchange Established

First commercial telephone exchange in New Haven, Connecticu...
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1837
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1878
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1912
1936

✉️ Samuel Morse Develops Morse Code

Samuel Morse invents Morse code.⟶
Samuel Morse Develops Morse Code (1837)
CommunicationTelegraphSamuel MorseElectrical Engineering
United StatesUnited States

🐎 Pony Express Begins Operations

The Pony Express started.⟶
Pony Express Begins Operations (1860)
TransportationCommunicationWestward ExpansionAmerican WestInfrastructure
United StatesUnited States

📞 First Commercial Telephone Exchange Established

First commercial telephone exchange in New Haven, Connecticut.A barricade in the Paris Commune, 18 March 1871. Around 30,000 Parisians were killed, and thousands more were later executed.⟶
First Commercial Telephone Exchange Established (1878)
CommunicationInfrastructure
United StatesUnited States

📻 First Commercial Radio Broadcasts

First commercial radio transmissions.⟶
RadioCommunicationBroadcastingGuglielmo MarconiEntertainmentMedia
United StatesUnited States

🚊 Articulated Trams Introduced in Boston

The first use of articulated trams by Boston Elevated Railway.⟶
Articulated Trams Introduced in Boston (1912)
TransportationUrban DevelopmentPublic TransitInfrastructure
United StatesUnited States

🏞️ Hoover Dam Completed

The Hoover Dam is completed.⟶
Hoover Dam Completed (1936)
InfrastructureGreat DepressionConstruction
United StatesUnited States