TheCodeBreakers
guidance, the runs to reconstruct the relative additive sequence, correct
it to the absolute sequence, and strip it from the encicode message. This
machine would then compare the placode groups with the decode cards
in its storage and print out the plaintext for whatever decode cards it
had. Presumably it would also print out the various possibilities in the
case of garbled or partial codegroups. It could also make frequency
counts and contact counts and on command could disgorge a desired set
of statistics—all codegroups preceding and following a given codegroup,
for example. Head of the I.B.M. room, which was constantly being
enlarged, was Lieutenant Commander Jack S. Holtwick, Jr., a 1927
Annapolis graduate who had done cryptologic work at the Navy
Department, the 16th Naval District, and the Asiatic Fleet from 1934 to
1939; he had reported to the Hawaiian unit in June of 1940.
Not every cryptogram was decrypted. Japanese traffic was too heavy
annaabi.ee 
