The URL appears at the bottom right of each listing and is the unique electronic address on the Internet that identifies the location of that specific file and permits access to it and the access tool required. A widely adopted standard for URLs is a relatively recent development. The Internet Yellow Pages is the first published work to refer to all Internet addresses as URLs, and adopts this standard to all addresses listed. Very soon, hopefully, the URL will become a global standard.
Information moves across the Internet very much like mail moves through post offices.
In either case, it may travel along with thousands of other unrelated messages. The Internet URL is made up of specific address parts that guarantee a unique address code for each information packet or file. Just as the world is divided up into continents, countries, and regions. Internet addresses are divided up into domains and subdomains . Countries have domain names, and these are known as top level domains .