Artifact Details

Title

Johnniac - Exhibit 1700 Main Open House

Catalog Number

102689107

Type

Still Image

Identifying Numbers

Other number #1538 Verso pencil

Dimensions

overall: 8 in x 10 in

Description

Black and white. Johnniac exhibit at 1700 Main Open house. To the right is Johnniac mainframe without components installed. To the left is a table with two exhibits.
The left exhibit shows a selectron tube tester. The label: "Selectron This special RCA tube will be used in the internal memory of the Johnniac machine. Each tube can remember 256 binary digits. As exhibited here, the tube is in a test unit, the green spots indicate where a digit '1' is stored and an unlighted spot a '0'". The exhibit on the right has a magnifying glass over an unknown object. There is an unreadable label.
in front of the exhibt are standards with cloth cables to restrict visitors.

Category

Photograph

Credit

Courtesy of Gwen Bell

Lot Number

X7413.2015