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/20110106183200/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/bit
A Bit is the smallest unit of stored computer data. It is a single digit number and normally a page that is full of just text will contain around 16,000 Bits.