The Encapsulated PostScript (EPS) language file format is supported by most illustration and page-layout programs and, in most cases, is the preferred format for these applications.
Encapsulated PostScript: can combine bitmap and vector files. EPS does not need the software that created it.
These files are used primarily on PostScript printers. These printers usually offer more variety of fonts and higher resolution than standard laser printers. EPS files will work on any PostScript compatible printer and any end-user application that supports placement of EPS files in its workspace.
The image that you read from an EPS file can be a PostScript raster image, an embedded TIFF image, or an embedded WMF image. The image that you write to an EPS file is always a PostScript raster image.