Below is the related text found on the OFCCP web site under their Question and Answers:
Vacancy Announcement Tagline
1. May contractors satisfy the EEO tagline requirement by abbreviating "disability" and "protected veteran status" as "D" and "V," respectively?
Contractors may refer to those protected by Section 503 or VEVRAA by abbreviation, but such abbreviations must be commonly understood by those seeking employment. Simply using "D" and "V" are not adequate abbreviations for this reason. For those protected by Section 503 or VEVRAA, the tagline should at a minimum state "disability" and "vet" so that the tagline will be clearly understood by jobseekers.