Graphic File Types
Graphic File Types
The following file types are available for multiple operating systems:

The EPS file format is the sharpest file format available, and it stays sharp when resized. EPS requires software such as Adobe Illustrator or Freehand. If you have EPS based software and plan to resize or edit the image, EPS is the recommended method of download.

Note regarding EPS files in Internet Explorer for PCs:
When attempting to download EPS files, Internet Explorer will automatically change the ".eps" file extension to ".ps." To ensure the integrity of the file, please change the file extension back to ".eps" when downloading. Be certain to open the file using an image-editing program. Simply double-clicking the saved item in your hard drive will not create a proper file association, and the file will not open. 

The GIF format is used extensively for Web graphics, particularly logo files. GIFs, unlike JPGs, support transparency, so using this file format allows you to insert the graphic onto a Web page in a more seamless design.

The JPG format is used extensively for Web graphics, particularly photographs. The JPG file format is a "lossy" format. That means each time the JPG image is opened, manipulated in any way and then resaved, the image's quality will degrade.

The TIF format was created for photographs, but, unlike JPG, doesn't lose information or introduce noise when resaving the image. The TIF format works well with page layout software such as Adobe InDesign and Quark XPress.