Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The uniqueness of observatory publications   Observatory publications comprise the work of local astronomers from
observatories around the world and are traditionally exchanged between
observatories through libraries. However, large collections of observatory
publications seem to be rare; or at the least rarely digitally described or
accessible on the Internet. Notable examples to the contrary are the Woodman
Astronomical Library at Wisconsin-Madison and the Dudley Observatory in
Loudonville, New York both in the US. Due to the irregularities in receiving
material, the collections are generally often incomplete both with respect to
the observatories included as well as volumes. In order to assess the unique
properties of the collections, we summarize and compare observatories present
in our own as well as the collections from the Woodman Library and the Dudley
Observatory.

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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
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The categories of this paper are: funct-an
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The categories of this paper are: econ
3
The categories of this paper are: physics
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin