EPSEncapsulated PostScript File
FIles with EPS extension essentially describe an Encapsulated PostScript language program that describes the appearance of a single page. The name "Encapsulated" because it can be included or encapsulated in another PostScript language page description. This script based file format may contain any combination of text, graphics and images.
PSDAdobe Photoshop Document
PSD, Photoshop Document, represents Adobe Photoshop's native file format used for graphics designing and development. PSD files may include image layers, adjustment layers, layer masks, annotations, file information, keywords and other Photoshop-specific elements. Photoshop files have default extension as .PSD and has a maximum height and width of 30,000 pixels, and a length limit of two gigabytes.