Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Scratch-like visual programming system for Microsoft Windows Phone 8   Pocket Code is a free and open source mobile visual programming system for
the Catrobat language. It allows users, starting from the age of eight, to
develop games and animations with their smartphones. Children can create
programs with their Android phone, iPhone, Windows Phone, or other smartphone
with an HTML5 browser. No notebook or desktop computer is needed. Pocket Code
is inspired by, but distinct from, the Scratch programming system developed by
the Lifelong Kindergarten Group at the MIT Media Lab. This tool demo describes
an in-practice experience with Pocket Code, the Windows Phone IDE for the
Catrobat language.

14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom