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/20110106184636/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/popup
A Popup is a form of advertising that will 'popup' in a new browser when you are on a Web site. They are seen as a bit of a nuisance and you can install software to block popups so they do not interupt you.