Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Computing Nature: A Network of Networks of Concurrent Information
  Processes   This text presents the research field of natural/unconventional computing as
it appears in the book COMPUTING NATURE. The articles discussed consist a
selection of works from the Symposium on Natural Computing at AISB-IACAP
(British Society for the Study of Artificial Intelligence and the Simulation of
Behaviour and The International Association for Computing and Philosophy) World
Congress 2012, held at the University of Birmingham, celebrating Turing
centenary. The COMPUTING NATURE is about nature considered as the totality of
physical existence, the universe. By physical we mean all phenomena, objects
and processes, that are possible to detect either directly by our senses or via
instruments. Historically, there have been many ways of describing the universe
(cosmic egg, cosmic tree, theistic universe, mechanistic universe) while a
particularly prominent contemporary approach is computational universe, as
discussed in this article.

13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
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The categories of this paper are: math-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th