Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymptotic Freedom and the Emergence of QCD   I describe our understanding of the strong interactions at the end of the
1960's and the impact of the experiments on deep inelastic scattering. I recall
the steps that lead from the attempts to understand these experiments to the
discovery of asymptotic freedom in 1973 and the subsequent rapid emergence,
development and acceptance of the non-Abelian gauge theory of color (QCD) as
the theory of the strong interactions.

3
The categories of this paper are: physics
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex