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/20110106210300/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/cd
CD is the term used for the circular disk that was created in the 1980s. CDs can hold 700MB of data and this data (stored in the form of notches) is read by a laser in a CD player's optical drive.