Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Report on the Fourth Workshop on Sustainable Software for Science:
  Practice and Experiences (WSSSPE4)   This report records and discusses the Fourth Workshop on Sustainable Software
for Science: Practice and Experiences (WSSSPE4). The report includes a
description of the keynote presentation of the workshop, the mission and vision
statements that were drafted at the workshop and finalized shortly after it, a
set of idea papers, position papers, experience papers, demos, and lightning
talks, and a panel discussion. The main part of the report covers the set of
working groups that formed during the meeting, and for each, discusses the
participants, the objective and goal, and how the objective can be reached,
along with contact information for readers who may want to join the group.
Finally, we present results from a survey of the workshop attendees.

5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom