The domain name system was introduced in 1983. A domain name was initially a proxy of an IP address, which functions as an identifier to locate or recognise internet resources, such as computers, networks, and services, with a text-based label that is easier to memorise than the numerical addresses used in the IPs. When the system was devised in the 1980s, there were only two groups: (a) country code top-level domains (ccTLDs); and (b) seven generic top-level domains (gTLDs).