host posted on March 23, 2007 23:08
A permalink is a URL that points to a specific blogging entry even after the entry has passed from the front page into the blog archives. Because a permalink remains unchanged indefinitely, its use avoids link rot. Most modern weblogging and content-syndication software systems, including Wordpress, Movable Type, LiveJournal, RapidWeaver, Pivot and Blogger, support such links. Other types of websites use permalinks, too, but the term itself is most common within the blogosphere. Permalink is a portmanteau word made from permanent link and is often simply stated so as to be human-readable.
Source: http://en.wikipedia.org/wiki/Permalink
A Trackback is one of three types of Linkbacks, methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to, or referring to their articles. Some weblog software programs, such as Movable Type and Community Server, support automatic pingbacks where all the links in a published article can be pinged when the article is published. The term is used colloquially for any kind of Linkback.
Source: http://en.wikipedia.org/wiki/Trackback