The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Web wide crawl with initial seedlist and crawler configuration from October 2010
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20110106204842/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/ssi
SSI (Server Side Includes) is a term used for an easy to use scripting language that is server side. It is normally just used for the web and its main use is to include contents from one file into another one.