Artifact Details


7101 Central Processing Unit 28 (IBM Stretch)

Catalog Number



Physical object


International Business Machines (IBM)

Place Manufactured

N.Y., U.S.

Identifying Numbers

Model number 7101 Found on the label on the right front door of the unit.
Other number 28 Unit number found on the right front door.
Other number X-7101-30003 MI Found on a metal tag on the right CPU frame.


overall: 69 in x 20 in x 66 in


This object has a metal frame with one open side, one side covered by four panels, and a door on the back. The thin panel on the far right has a red "Emergency" on/ off switch at the top. The front two thirds of the frame contain a roll-out unit with two hinged card cages. The cages are filled with IBM modules. At the top there is an orange add on bracket with one screw protruding from the middle. The back third of the frame is for cabling. In the right card cadge four rows of connectors have been replaced by a sheet of masonite and brackets holding power resistors. There is a small yeloow sticker above the door at the front reading, "Master Sync."


Digital computer/supercomputer


Gift of Lowell Wood

Lot Number