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/20101206225320/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/digital
Digital is the term used to describe the 1s and 0s that all data is made up of. As computers are digital machines that use the binary system they will only read on or off, but this is translated into music or video (in the case of CDs and DVDs).