HEATKEYS

YouTube is a place to discover, watch, upload and share videos.

RC Groups - the most active Radio Control model community: electric and fuel rc airplanes,rc helis,rc boats and rc cars. Features discussion forums, blogs, videos and classifieds.

Homepage of the Operations Research and Financial Engineering department at Princeton University, NJ USA

Thingiverse is a universe of things. Download our files and build them with your lasercutter, 3D printer, or CNC.

Shapeways is your personal fabrication service, using 3D printing. Personalized products for YOU and BY you.

3ders.org provide in-depth information about 3D Printing, rapid prototyping, rapid manufacturing, 3D Printers, 3D software, 3D services, 3D designers, 3ders, 3D printer price, 3D printer price compare, 3d printer price comparison

Vimeo is a respectful community of creative people who are passionate about sharing the videos they make. We provide the best tools and highest quality video in the universe.

Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessories, shoes, jewelry, tools & hardware, housewares, furniture, sporting goods, beauty & person...

Where the Science goes.

The leader in 3D education, 3D learning, and virtual reality, SUNRISE takes the internet into 3D with virtual learning programs that open up into a new window.

Sea and Sky is your one-stop source for all things related to the oceans, seas, and space exploration; features information, games, images, news, and much, much more.

There are many people today who are concerned with the serious problems that face our modern society: unemployment, violent crime, replacement of humans by technology, over-population and a decline in the Earth