Detail map of Washington, District of Columbia, United States Overview map of Washington, District of Columbia, United States

A: Washington, District of Columbia, United States

LC Compiles a Bibliography by Electric Punched Card Tabulating

1950
Keypunch operator, NOAA, Asheville, North Carolina, ca. 1942.
Image Source: longstreet.typepad.com

Keypunch operator, NOAA, Asheville, North Carolina, ca. 1942.

In 1950 the Library of Congress announced plans to compile the Union List of Serials using electric punched card tabulating. This was feasible using the electronic punched card tabulators available at the time.

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