.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.
What is a WP4 file?
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.