The Text REtrieval Conference (TREC) is an annual event that supports "research within the information retrieval community by providing the infrastructure necessary for large-scale evaluation of text retrieval methodologies." Proceedings of the conference covering all twelve years of its history are available on the TREC homepage. As TREC has evolved, it has added several focus areas that span new and different topics in information retrieval. These tracks mainly examine methods of searching and filtering different types of data, including genomic records, digital video, and data that is given in multiple languages.