The description of wpd format expansion
A wpd file is a text document created by Corel WordPerfect, a popular word processor. It may contain images, drawn objects, tables and formatted text. wpd files are stored in a proprietary Corel format, but can be exported to other formats from within WordPerfect.
Corel discontinued the DOS and Macintosh versions of WordPerfect in 1997. The company still develops and supports the Windows version and includes it as the primary application within the WordPerfect Office suite.