Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The modulus in the CAD system drawings as a base of developing of the
  problem-oriented extensions   The concept of the "modulus" in the CAD system drawings is characterized,
being a base of developing of the problem-oriented extensions. The modulus
consists of visible geometric elements of the drawing and invisible parametric
representation of the modelling object. The technological advantages of
moduluss in a complex CAD system developing are described.

25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg