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/20101206222220/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/icon
An Icon is a symbol or picture that is used to represent a program or an object which is on your computer. Files that are on your desktop are examples of icons as the recycle bin on Windows and the Trash can on Macintosh.