Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards field-programmable photonic gate arrays   We review some of the basic principles, fundamentals, technologies,
architectures and recent advances leading to thefor the implementation of Field
Programmable Photonic Field Arrays (FPPGAs).

6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph