This document discusses and compares patent and non-patent literature as sources of information for research. It provides examples of various types of non-patent literature including academic journals, books, conference papers, and technical reports. It also lists several online databases and search engines that provide access to non-patent literature, patents, and other sources. The document notes that while patent and non-patent literature differ in their purposes and disclosure styles, they also have similarities and can provide complementary information for researchers. It emphasizes searching both sources for the most comprehensive information.