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/20110106210438/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/irq
IRQ (Interrupt Request) is a term used to describe the managing of various hardware operations on one processor. When a program is run it will send an interrupt request to the processor that lets the program join the list of requests running.