Title
Johnniac - Exhibit 1700 Main Open HouseCatalog Number
102689107Type
Still ImageDescription
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.
Identifying Numbers
Other number | #1538 | Verso pencil |
Dimensions
overall: 8 in x 10 inCategory
PhotographCredit
Courtesy of Gwen BellLot Number
X7413.2015Related Records
102689106 | Johnniac - Exhibit - 1700 Main Open House |
102689087 | Johnniac - Exhibit - 1700 Main Open House |