Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The MAID Legacy and Future   The MAID project is a collection of theoretical models for pseudoscalar meson
photo- and electroproduction from nucleons. It is online available and produces
results in real time calculations. In addition to kinematical variables also
model parameters, especially for baryon resonances, can be online changed and
investigated. Over 20 years MAID has become quite popular and the MAID web
pages have been called more than 7.7 million times.

20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat