Exercise 14 is to “explore technorati and learn how tags work with blog posts.” I signed up for an account with the blog search engine Technorati, and I am beginning to use tags in my blog postings. I also learned what “folksonomy” means. According to wikipedia, “A folksonomy is a system of classification derived from the practice and method of collaboratively creating and managing tags to annotate and categorize content; this practice is also known as collaborative tagging, social classification, social indexing, and social tagging. Folksonomy is a portmanteau of folk and taxonomy.” The Library of Congress Classification system is a taxonomy because it uses a very specific controlled vocabulary, not user-picked keywords.