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John Vincent Atanasoff

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Title: Atanasoff-Berry Computer drawing, 1941
Collection Description: A drawing of the Atanasoff-Berry Computer showing the drum covers removed. The ABC Computer was built in Physics Hall (Physics Building) at Iowa State University.

Title: Side view of the Atanasoff-Berry Computer, 1942
Collection Description: A side view of the Atanasoff-Berry Computer. The computer contained 280 vacuum tubes and 31 thyratrons.

Title: Atanasoff-Berry Computer drawing, 1985
Collection Description: A drawing of the Atanasoff-Berry Computer with parts identified, 1985.

Title: View inside the replica of the Atanasoff-Berry Computer
Collection Description: A view inside the replica of the Atanasoff-Berry Computer.

Title: The last remaining part of the Atanasoff-Berry Computer
Collection Description: This drum is all that remains of the Atanasoff-Berry Computer at Iowa State University. The drum is shown with a ruler for purpose of scale.

Title: Part of an Atanasoff-Berry Computer
Collection Description: The Atanasoff-Berry Computer was completed in 1942 in the basement of Physics Hall at Iowa State University. It was about the size of a desk and weighed more than 700 lbs.

Title: John L. Gustafson with the working replica of the Atanasoff-Berry Computer
Collection Description: John Gustafson is standing with the replica of the Atanasoff-Berry Computer. John was part of a team from the Department of Computer Science at Iowa State University that built the replica of the Atanasoff-Berry Computer in 1997.

Title: Physics Hall, 1943
Collection Description: The Atanasoff-Berry Computer was built and stored in the basement of Physics Hall (Physics Building) located at Iowa State University.

Title: Clifford Berry and the original Atanasoff-Berry Computer
Collection Description: Clifford Berry and the original Atanasoff-Berry Computer.

Title: Atanasoff-Berry Computer frame, circuit installed
Collection Description: The frame for the Atanasoff-Berry Computer with the circuit installed.

Title: Atanasoff-Berry Computer during construction phase
Collection Description: The Atanasoff-Berry Computer taken from John Vincent Atanasoff files during the construction phase. The 280 vacuum tubes served as logic gates.

Title: John V. Atanasoff letter to R. M. Bowie of the Hygrade Sylvania Corporation regarding the purchase of vacuum tubes, January 4, 1940.
Collection Description: Letter from John V. Atanasoff to R. M. Bowie of the Hygrade Sylvania Corporation regarding the purchase of vacuum tubes, January 4, 1940. The letter details the construction of a computing machine Atanasoff is building with the assistance of Mr. Berry and an inquiry about receiving a better price on vacuum tubes.

Title: Photograph of the Atanasoff-Berry Computer (ABC) punched card readers
Collection Description: A close-up view of the punched card readers on the Atanasoff-Berry Computer (ABC).

Title: Photograph of the back of the Atanasoff-Berry Computer (ABC) punched card readers
Collection Description: The view of the back of the punched card readers on the Atanasoff-Berry Computer (ABC) from the legal records.

Title: Drums of the Atanasoff-Berry computer, Physics
Collection Description: The keyboard and counter drums contained 1600 capacitors each. The capacitors stored charge, acting as a primitive memory unit.

Title: Manual for the Atanasoff-Berry Computer
Collection Description: Manual for the original Atanasoff-Berry Computer build by John Vincent Atanasoff and Clifford Berry.

Title: Iowa State Today, May 1, 1942, with John Atanasoff & Clifford Berry
Collection Description: Transcript of the radio show "Iowa State Today" on May 1, 1942 with Ione McNay interviewing John V. Atanasoff and Clifford Berry.