The Encapsulated PostScript format is a general-purpose format for storing text and graphics in vector or raster form.
The default extension for Encapsulated PostScript files is EPS
Supporting Platforms and Applications
This format is supported by numerous applications on a wide range of platforms.
PMView can only write EPS files, it cannot read them. Note that by using a program called Ghostview (freely available on the Internet) you can view EPS files and convert them to PBM Plus files (PBM, PPM, etc.) that are readable by PMView.