AllTheWeb

Search engine which was created by Fast, then bought by Overture [link], which was bought by Yahoo! [link]. Yahoo! may use AllTheWeb as a test bed for new search technologies and features.

Visit AlltheWeb

Algorithm

An algorithm is a set of finite, ordered steps for solving a mathematical problem. Each Search Engine uses a proprietary algorithm set to calculate the relevance of its indexed web pages to your particular query [link]. The result of this process is a list of sites ranked in the order of relevance as deemed by each particular search engine.

It is important to note:

Each search engine has a different algorithm that may weigh various factors differently.
Search engine algorithms are closely guarded in order to prevent exploitation of algorithmic results.
Search algorithms are also changed frequently to incorporate new data and improve relevancy.

Alexa

California, U.S.-based subsidiary company of Amazon.com [link:] that is known for its toolbar and website. Once installed, the toolbar collects data on browsing behavior which is transmitted to the website where it is stored and analyzed and is the basis for the company’s web traffic reporting.

Visit Alexa.com

AJAX

Asynchronous JavaScript And XML

Allows you to create a more user-friendly web application by working behind the scenes (inside a web browser) by making web pages feel more responsive.

In short, it allows JavaScript scripts to send data requests and receive responses without having to reload the entire page.

Agent Name

This is the name of the Crawler/spider that is currently visiting a page. Spider is a robot sent out by search engines to catalogue websites on the internet. When a spider indexes a particular website, this is known as ‘being spidered’.