Example image of eyePlorer eyePlorer map for 'Nvi': Berkeley Software Distribution Text editor Unix Vi AT&T Computer Systems Research Group University of California, Berkeley USL v. BSDi FreeBSD Keith Bostic NetBSD OpenBSD Perl TK Unicode GTK+ Berkeley DB Sleepycat Software BSD licenses Elvis (text editor) Curses (programming library) Ncurses Ancient UNIX systems Ctags Vile (editor) List of text editors NVI