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/20110106211736/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/pim
PIM (Personal Information Manager) is one a kind of software application that acts very much like a personal organiser. It has a note and address book and a planner, they can also include clocks and other useful features. PDAs often feature a PIM.