Crucial World War II encryption devices have found a home at the University Libraries thanks to the generosity of author Pamela McCorduck, wife of the late Computer Science Department Head Joseph Traub.
Totaling more than 50 calculating machines, letters and books, the collection contains important items in the history of computing. Included are two Enigma machines, electro-mechanical rotor cipher machines used to encrypt communication. Most notably, they were used by Nazi Germany to protect military communication during World War II. With this gift, which includes one 4-rotor machine and one 3-rotor machine, CMU becomes one of a handful of American institutions to own an Enigma machine. (Carnegie Mellon School of Computer Science - SCSCarnegie Mellon University)