DNS
From Wiki.openrbl.org
DNS - Domain Name System
See also: Nameserver TLD
[edit] What is the Domain Name System?
The Domain Name System (DNS) helps users find their way around the Internet.
Every computer on the Internet has a unique address called its "IP address" (Internet Protocol address).
Because IP addresses (which are strings of numbers) are hard to remember, the DNS allows a familiar string of letters (the "domain name") to be used instead.
So rather than typing "192.0.34.163", you can type "www.icann.org".
