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ON-Line%20System%20%28NLS%29%2C%20SRI%20%281960-1970s%29%20-%20chord%20keyboard%20-%20Computer%20History%20Museum.jpg
ON-Line%20System%20%28NLS%29%2C%20SRI%20%281960-1970s%29%20-%20chord%20keyboard%20-%20Computer%20History%20Museum.jpg
http://commons.wikimedia.org/wiki/Special:FilePath/ON-Line%20System%20%28NLS%29%2C%20SRI%20%281960-1970s%29%20-%20chord%20keyboard%20-%20Computer%20History%20Museum.jpg
chorded keyboard
P18
Q419894-25a3105d-4427-ae9e-e8e4-8fbaecc319fa
P18
ON-Line%20System%20%28NLS%29%2C%20SRI%20%281960-1970s%29%20-%20chord%20keyboard%20-%20Computer%20History%20Museum.jpg
http://commons.wikimedia.org/wiki/Special:FilePath/ON-Line%20System%20%28NLS%29%2C%20SRI%20%281960-1970s%29%20-%20chord%20keyboard%20-%20Computer%20History%20Museum.jpg