Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the history of photomultiplier tube invention   In this very short note we review some historical aspects of photomultiplier
tube invention. It is our tribute to the memory of great Soviet-Russian
physicist and engineer Leonid Aleksandrovitch Kubetsky whose life and
scientific achievements are described briefly. Particular efforts are made to
shed light on a controversial issue of who invented the first photomultiplier
tube. It is asserted that if to recognize L.A.Kubetsky's priority on the
photomultiplier tube invention the last Beaune Conference would be held on the
eve of the 75th Anniversary of that great event.

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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat