{Some of these are governmental others are not.}

• American Memory - a rich digital public domain collection of written and spoken words, sound recordings, still and moving images, prints, maps, and sheet music that document the American experience

• Smithsonian Institute - world's largest museum complex and research organization composed of 19 museums and 9 research centers.

• HistoryWired - some favorites from the National Museum of American History

• National Museum of American History - sample collections (only 5 to 8% ever online)

• John Wesley Powell - Memorial Museum

• Marian Koshland Science Museum of the National Academy of Sciences - events, teaching & learning, audio programs

• Museum of Broadcast Communications - in Chicago, archives of TV programs back to the 1940s and radio back to 1920s; requires free registration

• National Postal Museum - explore stamps and postal history