Back in the early days of the Internet when computers look like this people surfed the Internet by painstakingly typing entire website addresses into the URL bar of a browser.
The words in this web address are known as a domain name and every single one is stored on something called the Domain Name System, or DNS.
The DNS does one very important job. It translates memorable website addresses into the horribly unmemorable IP addresses made up of numbers and dots that computers use to communicate and access websites.
This worked fine for the first few years. But as the early Internet grew, it became clear that this system wouldn't be able to cope with demand.
In the 1980s, a California based supergeek called Jon Postel figured out a way of streamlining this clunky system.
And what he did was so important, it would eventually earn him the nickname 'God of the internet'.
Jon broke down the DNS into a hierarchical system that commands could flow through without getting all clogged up.
And to make it work, every website now included something called a TLD or Top Level Domain.
The TLD is the flourish after the dot that describes the type of website you're looking at.
The first six to be included were . Gov Governmenty. . Edu Educationy. . Net Internetty. . Mil military-y. . Org Relating to nonprofit organs.
