Mary Ann Horton, formerly Mark R. Horton (as printed by wikipedia), was a Usenet pioneer. Horton co-wrote the B News server software. Freely presented as both Mark and Mary Ann.
An internet pioneer in early 1980s, leading Usenet growth on thousands of UNIX servers. Registered .com domains for "have-not" organizations. Led UUCP Zone, a team of 50 volunteers mapping the UUCP net for UNIX e-mail routing.
Developed and supported parts of Berkeley UNIX, including vi, curses, terminfo and termcap.