BIND (Berkeley Internet Name Domain) is the most commonly used DNS-server on the Internet. It is made by the Internet Software Consortium. Like Sendmail or FTP, BIND has had a high number of security vulnerabilities in the past.
... District Line or Northern City Line (Great Northern & City Railway) remain open as mainline stations:
Great Missenden tube station[?]
Wendover tube station[?]
Stoke ...