sites include www in the URL while others don't?." 01 April 2000. HowStuffWorks.com. 20 November 2009.. You may have noticed that on many sites, the "www" part is not required. You can just as easily useto get to HowStuffWorks. There are other sites that have extra layers of naming, such as http://www.delphion.com and http://journal.iftech.com, that...