.WP4 File Extension
File TypeWordPerfect 4 Document
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
Word processing document created by WordPerfect 4.x for DOS, the first version to include automatic paragraph numbering; overtook WordStar as the most popular word processor for the DOS platform.
WP4 files can be opened by Corel WordPerfect 4 or later.