Which professions use rapid prototyping ?

3D Printing
,
1

Which professions use rapid prototyping ?
Websites of large companies of 3D printing machines or services often give a list of the industries where these machines/services are used, but except architects, jewel designers, dentists and vehicles manufacturers there are no clearly identified professions that one could find in the yellow pages. Do you know any ?

2

I know several toy designers who use them extensively.

3

I protest! you left out, Homebrew Mad Scientist.

4

The Film industry in Wellington uses them extensively, mainly for props and scale models.