Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Content Management in Ruby on Rails   Web development is currently driven by model-view-controller (MVC)
frameworks. How has content management adapted to this scenario? This paper
reviews content management features in Ruby on Rails framework and its most
popular plug-ins. These features are distributed among the different layers of
the MVC architecture.

23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph