This document discusses social networking and social software. It defines social networking as maps of relationships between individuals, and social software as allowing people to connect through computer networks. It then outlines different types of social networking sites like MySpace and LinkedIn, how users can customize profiles and make connections. It also covers tagging and folksonomies for organizing user-generated content on sites like Flickr, YouTube, and Delicious. Overall, the document examines the diverse social media landscape and how personal, collaborative, and DIY applications allow for sharing and republishing content.