The '''[[http://archive.org/web/web.php Wayback Machine]]''' is a section of the Internet Archive. What makes this website so notable is that, while the Internet Archive is, [[CaptainObvious well]], [[ExactlyWhatItSaysOnTheTin an archive of the Internet]], the Wayback Machine allows people to ''actually access'' past versions of web pages.
In other words, it's the browser version of a time machine.
Here's how it works: after accessing the WM website through the link at the top of this page, users can paste a URL address on the input-box next to the "Take Me Back" button, and then, after clicking said button, the user is shown a calendar-like list of archived pages (provided there are any). Dates written on blue dots are links to versions of that particular page archived on that particular date.
This site is recommended to everyone who feels [[NostalgiaFilter nostalgic]] about certain sites prior to [[TheyChangedItNowItSucks unwanted changes]].
However, that very same kind of feeling is mirrored by part of TVTropes' community as well, so, for every troper who has never witnessed certain articles prior to deletion of either [[ExampleSectionectomy examples]] or [[Administrivia/PermanentRedLinkClub whole articles themselves]], [[http://wayback.archive.org/web/20100910084226*/http://tvtropes.org/pmwiki/pmwiki.php/Main/MainPage this link]] leads to the results for the TV Tropes MainPage in the Wayback Machine; changing the URL posted to that of either existing articles or Administrivia/PermanentRedLinkClub members, they can access most of the site as it used to be. [[http://web.archive.org/web/20100628221425/http://tvtropes.org/pmwiki/pmwiki.php/Main/SoYeah It's also a good way to]] [[ShowDontTell show (and not tell)]] exactly ''why'' certain articles are now perma-redlinked.