Wikipedia:Articles for deletion/Purple Numbers
I don't see much in the way of sources, but it's mentioned at http://www.dougengelbart.org/about/hyperscope.html, so a redirect to the inventor and a brief mention of it in that article would make sense per  and 
— User:RoySmith, 17:51, 12 April 2018 (UTC)
Stance: merge
Cited policy: WP:ATD||WP:CHEAP (Wikipedia:Deletion policy)