When you're creating multi-layered RGB- or CMYK-color compositions in Adobe Photoshop for in-house or client projects, you may need to use the content of one of the channels in your document by itself ...

An .EPS is a special digital image format that stands for "encapsulated postscript." Only specific graphics software, such as Photoshop, Photoshop Elements or Illustrator, can open and edit this file.