OpenVAS (Open Vulnerability Assessment System, originally known as GNessUs) Open Source vulnerability scanner and manager forked from Nessus. Functions much like a database server, performing complex queries while the client interfaces with the server to simplify reporting and configuration. Began under the name of GNessUs as a fork of Nessus October 2005. Website Wikipedia
Post Office Protocol (POP) (v2, port 109. v3, port 110.) Application layer protocol used for receiving email. First defined in RFC 918 October 1984. Wikipedia RFC 918
Unique Local Address (ULA) These addresses should not be routable in the global IPv6. Unique local addresses are in the range of FC00::/7 to FDFF::/7. Defined in RFC 4193 October, 2005. Wikipedia RFC 4193