| open directory project | (ODP) See DMOZ. One of the oldest and most comprehensive human-reviewed directories on the web. |
| http status codes | A response from a server to an incoming request indicating the status of the requested page. In human terms: if you cant get to the page youve requested, these errors will tell you why. |
| rank | Where a webpage appears within the organic search results for a specific query. |
| domain name server | (DNS) A naming format that pairs a domain name or host with a certain TCP/IP address. |
| a/b test | Noun phrase. The practice of creating two documents or sites that are nearly the same for the purpose of determining which design or copy variation produces the better result. Often used in PPC marketing, occasionally used in organic SEO (q.v.). |
