> As early as 1996 browsers were already inserting the http:// and www. for users automatically (rendering any advertisement which still contains them truly ridiculous).
That, and in a typical virtualhost based http/https setup now, it's standard DNS configuration to point the A record for the 'root' of the domain (domainname.com) to the same IP address as the www.domainname.com DNS record.
For some reason I typed "www" for an emberessly long time.