This document discusses different file formats for digital graphics. It begins by defining raster graphics as bitmap images composed of pixels and lists common raster formats like JPEG, TIFF, and PNG. It then discusses vector graphics, which use mathematical equations to represent shapes and lines, and lists vector software. The document also covers metafiles, which can contain both raster and vector graphics, and examples include WMF and EMF. It concludes by explaining what file extensions are and providing examples.