TheCodeBreakers
For computer processing, key-punch
operators very likely punch the messages on cards, and technicians feed
the cards into the computers.
N.S.A. probably has more computer equipment than any
other installation in the world. Some of those it reportedly has are
general-purpose computers, such as the I.B.M. Stretch, one of the
world's fastest and most powerful computers, the $2,898,000 I.B.M.
7090, which can perform 229,000 additions per second, and late-model
Univacs; there is also the Atlas, which N.S.A. had built to its own
specifications early in the 1950s, and probably several smaller general-
purpose computers. The agency also has a great deal of special computer
equipment. For example, a device may be built to run the kappa test
instead of wasting a general-purpose computer on so restricted a task.
N.S.A. may use its computers to determine which configuration of
possible displacements on a rotor produces the group of letters that most
annaabi.ee 
