Science & Tech
3
AT&T introduced the first commercial modem in 1958.
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Sacramento, California · United States
NEARBY MARKERS
The Invention of the Transistor
Science & Tech
The First Air-to-Ground and Ground-to-Air Communications
Science & Tech
First Transcontinental Telephone Line
Science & Tech
Governor's Mansion State Historic Park
Civics
California Vietnam Veterans Memorial
Military
California Native American Monument
History
