Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards Security of Additive Layer Manufacturing   Additive Layer Manufacturing (ALM), also broadly known as 3D printing, is a
new technology to produce 3D objects. As an opposite approach to the
conventional subtractive manufacturing process, 3D objects are created by
adding thin material layers over layers. Until recently, they have been used,
mainly, for plastic models. However, the technology has evolved making it
possible to use high-quality printing with metal alloys. Agencies and companies
like NASA, ESA, Boeing, Airbus, etc. are investigating various ALM technology
application areas. Recently, SpaceX used additive manufacturing to produce
engine chambers for the newest Dragon spacecraft. BAE System plans to print
on-demand a complete Unmanned Aerial Vehicle (UAV), depending on the
operational requirements. Companies expect the implementation of ALM technology
will bring a broad variety of technological and economic benefits. This
includes, but not limited to, the reduction of the time needed to produce
complex parts, reduction of wasted material and thus control of production
costs along with minimization of part storage space as companies implement
just-in-time and on-demand production solutions. The broad variety of
application areas and a high grade of computerization of the manufacturing
process will inevitably make ALM an attractive target for various attacks.

25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat