Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Microscopic atom optics: from wires to an atom chip   We give a comprehensive overview of the development of micro traps, from the
first experiments on guiding atoms using current carrying wires in the early
1990's to the creation of a BEC on an atom chip.

28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga