Artifact Details Title Whirlwind vacuum tube rack Catalog Number 102731840 Type Physical object Description Object is a rack bearing 10 vacuum tube modules. Along the top and bottom edges are 5 BNC connectors There are five terminal strips on the right end. On the back are three pairs of indicator lights, one red and one clear in each pair. Date 1951 Manufacturer Massachusetts Institute of Technology (MIT) Identifying Numbers Other number L4-F Black plastic label back upper left Other number PIUMP #263 Black plastic label back lower left Serial number 263 Printed upper left corner Dimensions overall: 7 1/2 in x 26 in x 13 in Category Component/module