Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Project X ICD-2 and its upgrades for Neutrino Factory or Muon Collider   This paper reviews the Initial Configuration Document for Fermilab's Project
X and considers its possible upgrades for neutrino factory or muon collider.

21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg