<ul><li>The telephone marked the start of instant communication history, allowing people to converse in real-time.</li><li>Early telephones were large and primarily used by businesses and the wealthy due to the high cost.</li><li>Telephone networks expanded rapidly, and call operators played a critical role in connecting calls.</li><li>In the mid-20th century, touch-tone dialing and advancements in electronics made phones smaller and more reliable.</li></ul>

The Telephone: Its Impact and Evolution

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