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Examples: spectrograph, medical x-ray tube, Newtonian reflecting telescope, compound microscope.

Date when an object was first made.

The unique category assigned by the Collection to an object. For a search by scientific field or discipline, search on the subject checklist instead.

Geographical regions associated with where an object was made or used.

Cities associated with where an object was made or used. The use of English names is preferred (ex: Munich instead of Munchen).

Scientific fields associated with the object. Each object can have multiple subjects assigned.

People or organizations associated with an object: makers, inventors, owners, sellers, suppliers, repairers etc.

Textual description of an object.

Textual explanation of the use of an object.

Textual information inscribed on an object, including maker plates, signatures, scribblings, stickers, etc.

Historical attributions, provenance and curatorial remarks.

Documentary sources, related works and published references associated with the object.

Materials present or contained in the object.

The unique number assigned by the Collection to an object.

Examples: Bejamin Franklin, General Electric, University of California, Electro-Acoustic Laboratory.

Biographical dates of a person, or dates of the existence of an organization.

Geographical regions associated with where a person was born or lived, and an organization was founded and operated.

Cities associated with where a person was born or lived, and an organization was founded and operated. The use of English names is preferred (ex: Munich instead of Munchen)

Textual biography or company history.

The title of a library object such as a book, journal article, trade catalog etc.

People or organizations associated with a library object : authors, editors, makers etc.

Year of publication, or of writing in the case of an unpublished manuscript.

Journal name (in case of an article), publisher and city of publication. Essentially, the standard information in a bibliographic citation.

Whether the library object is a book, manuscript, trade catalog etc.

Subject or scientific discipline related to the library object. This list of subjects is different from the one used for collection objects, and has not been completely standardized yet.

Language of publication.

The unique number assigned by the Collection to a bibliographic entry.