Reference number: 28472
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Crystallographic computing at Caltech 1947
Computing Center
![[1947: Crystallographic computing at Caltech: Computing Center]](https://www.iucr.org/__data/assets/image/0005/28472/xraycalc037.jpg)
IBM (Hollerith) operators at the Caltech Computing Center machine room performing crystallographic computation using the IBM card punch systems
[Contributed by L. M. D. Cranswick on 15 Jan 2010]
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