Visual interface editor clone (UNIX)
vi [options]... [+command] file...
See elvis for a full listing.
The vi utility is an interactive fullscreen editor that's compatible with the Unix/POSIX vi editor. The vi utility in QNX Neutrino is a link to elvis.
Using Editors in the Neutrino User's Guide
Linda Lamb, Learning the vi Editor, O'Reilly and Associates, 1990