Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Development of Low Cost Private Office Access Control System (OACS)   Over the years, access control systems have become more and more
sophisticated and several security measures have been employed to combat the
menace of insecurity of lives and property. This is done by preventing
unauthorized entrance into buildings through entrance doors using conventional
and electronic locks, discrete access code, and biometric methods such as the
finger prints, thumb prints, the iris and facial recognition. We have designed
a flexible and low cost modular system based on integration of keypad, magnetic
lock and a controller. PIC 16F876A which is an 8-bit Microcontroller, is used
here as a main controller. An advanced simulation based compiler Flowcode V4 is
used to develop the software part in this project.

32
The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
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The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
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The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
30
The categories of this paper are: q-alg