The .wpd file extension is primarily associated with WordPerfect, a word processing application developed by Corel. This format is used to store documents created and saved within WordPerfect. These documents can contain formatted text, images, tables, and other elements commonly found in word processing files. While WordPerfect was a dominant word processor in the 1980s and early 1990s, its popularity has waned with the rise of Microsoft Word. However, many users still have legacy .wpd files that they need to access. The .wpd format is a proprietary format, meaning its internal structure is specific to WordPerfect. This can sometimes make it challenging to open and edit .wpd files in other word processing programs without conversion. Modern versions of WordPerfect can save documents in more widely supported formats like .doc or .docx, which improves compatibility with other applications. Opening older .wpd files might require using an older version of WordPerfect or a dedicated file conversion tool. The format supports a variety of features including complex formatting, macros, and mail merge capabilities.