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/20110106181409/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/character
A Character is anything that can be created from a computer keyboard. This means all letters, symbols, numbers, punctuation etc. Characters are always one byte long.