Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MRST Parton Distributions -- status 2006   We present the new preliminary MRST parton distributions at NLO and NNLO. The
analysis includes some new data and there is an improvement in the theoretical
treatment at NNLO. Essentially complete NNLO partons are presented for the
first time, together with uncertainties.

14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat