I Choose this topic about the history of the impression 3d.

In the 1980s, equipment and materials for the manufacture of early additives were developed.3 In 1981, Hideo Kodama of the Municipal Institute of Industrial Research in Nagoya invented two AM methods of making a three-dimensional plastic model with a photo- That the area of ​​exposure to UV rays was controlled by a mask pattern or scanning fiber transmitter.

So, i choose this topic because i was interesant to know the origin of the new technology of 3d.
In the world are a lot of topics that you can find.