Useful Links

Vector basics
Quick and easy troubleshooting tips from iStockPhoto about common issues that vector buyers encounter when working with vector files.
What are vectors graphics?
Vector graphics is the use of geometrical primitives such as points, lines, curves, and shapes or polygons to represent images in computer graphics. For more info please read this article from iStockPhoto about vectors graphics.
This article from iStockPhoto answers some simple questions about the difference between CMYK and RGB colors.
Adobe Illustrator
Adobe® Illustrator® is a powerful brand of software used to create vector graphics. It is the industry standard, and countless professional designers from around the world create and edit graphics using Adobe Illustrator.
Vectips is a site dedicated to Adobe Illustrator® tips, tricks, and tutorials. Whether you are a seasoned Illustrator user or just starting out, Vectips can help.
Vectortuts+ is a blog of tutorials, articles, freebies and more on all things vector! They publish tutorials on techniques and effects to make awesome vector graphics in programs like Adobe Illustrator and Inkscape.