Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Review Paper on Microprocessor Based Controller Programming   Designing of microprocessor based controllers requires specific hardware as
well as software programming. Programming depends upon type of the software
whether operating software or application software. Programming requires
knowledge of system configuration and controller specific programming. Programs
are always in digital form so microprocessor can control directly at digital
level called Direct Digital Control (DDC).

3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex