Introduction In the fall of 2009, I studied Applied Machine Learning at CMU under Carolyn Rose. As a final project, I analyzed a leaked AOL search query dataset. After that class, I continued working with the data to identify unintentional haikus in users’ search histories. Machine Learning My Machine Learning project concerned identifying patterns in search behaviour. While the data set does not contain personally-identifiable information (at least not directly), it does group queries by user.