.PD File Extension

Large image design created by FlexiSIGN 5, a sign creation program; typically stores a graphic design in a vector graphic format so that the image can be resized without losing quality; may also store raster graphics and text.

PD files are used for storing signs and banners that can be printed on plotters and cutters.

File used by Spore, a creature evolution and survival game; stored within Spore audio .PACKAGE files and specifies audio settings for playing and looping background music; saved in a plain text format.