Vector graphics employ geometrical primitives such as points, lines, curves, and polygons, which are all based upon mathematical equations to represent images in computer graphics. It is used in contrast to the term raster graphics, which is the representation of images as a collection of pixels, and used as the sole graphic type for actual photographic images.
One key advantage to vector graphics is their relatively small file size reproduces at virtually any size -- limited only be software and/or output devise limitations. However, all art cannot be faithfully reproduced in the vector format; it is most suitable for art that requires sharp clean edges like logos, fonts or maps -- though professional drawing programs like Adobe Illustrator have the ability to include gradations and soft shadows. Since shapes are defined mathematically, edges remain sharp.
Vector graphics may be saved in their native application format with the appropriate file extension; Adobe Illustrator uses ".ai" or in an encapsulated PostScript (.eps) format for use in a wider range of applications. Adobe Illustrator includes the option to save artwork as PDF. Though the latter is preferred, EPS files with embedded fonts are accepted by Reactive Imaging.
A valuable tip for reducing output problems is to keep editable type on a separate hidden layer. On a duplicate printing type layer, convert all text to outlines. This way, the fonts are not necessary for output but are available for future textual edits.