WordPerfect 5.1 (3-9-92)
Released in 1992 by WordPerfect Corp
For DOS

5.25" media version
Image quality: No write notch/unmodified

During the late 1980's, WordPerfect was THE standard word processor
for DOS based PCs in big business. Under DOS, it competed mostly
against Wordstar.

Note: there are numerous minor updates to WordPerfect 5.1, only 
identified by the release date. This is WP5.1 3-9-92.