Paint Shop Pro (PSP) is a raster graphics eitor and, later in the series, a vector graphics editor for computers running the Microsoft Windows operating system that was originally published by Minneapolis-based Jasc Software. In October 2004, Corel Corporation purchased Jasc Software and the distribution rights to Paint Shop Pro. Paint Shop Pro supports natively both raster and vector graphics. PSP functionality can be extended by Photoshop-compatible plugins. They are listed in the 'Effects' menu, below the built-in effects.