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/20110106193952/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/folder
Folders on a computer are a way of storing files on your hard drive. You can name all the folders for ease of retrieval. Computers also store folders that contain information about the computers operating system.