Network Information Center (NIC) is an organization that supplies information to component networks that make-up the Internet.
NOC
Network Operations Center (NOC) is the organization responsible for the day-to-day operations of the Internet's component networks.
NODE
A node is a device attached to a network. A node uses the network as a means of communication and has an address on the network.
NON-DOMAIN
A non-domain is usually a sub-site on someone's domain (www.wwipp.com/sub-site). Non-domains do not have to be registered with InterNIC or any other domain name registrar.