programming panels and decoding circuits
1PP-DC — comp. abbr. Programming Panels and Decoding Circuits …
2PPDC — electr. abbr. Programming Panels and Decoding Circuits …
3Colossus computer — Colossus MkI/MkII A Colossus Mark 2 computer. The operator on the left is Dorothy Duboisson. The slanted control panel on the left was used to set the pin patterns on the Lorenz. The bedstead paper tape transport is on the right. Developer Tommy… …
