Originally Posted by butterflywing
sorry - i should have explained this better. when you bookmark a site or any information from that site, it's only as permanent as the site. think of the site as a store. you get whatever as you need it. maybe one at a time. but if the store closes, you can't get anything anymore. bookmark is the store. when the store shuts, everything you ever bought there is gone.
on the mac, or somewhere else on windows, there is finder. finder, or something else, is your house. whatever you bought at the store, is safely at home with you even f the store closes down. if the store closes, you have your thing in your pantry at home. you can't lose it. think of the site as the store here, too.
That is done by preserving a cached image of a website. For obvious reasons, some parts are not always preserved, like 20-year old pricing on stuff. The most well-known of these is called the Wayback Machine, after the old cartoon machine.
http://www.archive.org/index.php
It does not bookmark your sites, but often, you can find things there that you thought were gone forever. If you've ever Googled a subject and seen "cached" in the description, it was preserved as an archive, not necessarily as the current site version.