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- NPL - Current NPL numbering scheme.
- NPL-lastname - I have seen these, but I think they only occur in Alt Numbers. E.g. NPL-McCall, NPL-Garvie, NPL-Elliott, ...
- BEG - Bureau of Economic Geology Collection
- P - Plummer Collection.
- UT - Originally collected by members of the UT Dept. of Geological Sciences. Inclues the Changegrain Eocene collection.
- WSA - W. S. Adkins collection.
- K - R. H. King Collection.
- OMB - O. M. Ball collection, mostly Eocene plant material
- R - Rio Bravo Collection. From the Rio Bravo Oil Company.
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When we get donations from collectors, they normally have some scheme. As these are catalogued they are given NPL numbers, with the collector's original number in the Alternate Numbers field.
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