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This is the most famous government telephone.
hotline
This is broadcasting interference that keeps people from hearing real broadcasts.
Jamming
This enables Americans to pursue their interests with energy and enthusiasm.
political freedom
These transmit digital signals to towers, and each tower covers a certain area.
cell phone
The service that became this began broadcasting in 1942.
Voice of America
This enables writers and inventors to benefit from their creativity.
patent and copyright protection
This is sorting mail by shape and separating letters from larger envelopes and packages.
culling operation
This is the system of ZIP codes introduced by the Postal Service.
Zone Improvement Plan
This is the one way that technology has affected civic life.
making information available
Almon Strowger invented this, which allowed telephone users to call each other directly.
automated switchboard
Reasons the FCC (Federal Communications Commission) forced AT&T to break apart into smaller regional companies.
1.Controlled phone lines. 2.Controlled pricing. 3.Greater access to many. 4.Prevented a monopoly
1775
Benjamin Franklin appointed first Postmaster General.
1792
Post Office Department was created.
1872
Postmaster General became a member of the President's Cabinet.
1963
US Post Office began using ZIP codes.
1971
Post Office became an independent agency called the United States Post Office.
