The document is about NUŠL, the National Repository of Grey Literature in the Czech Republic. It provides information on what grey literature is, the types of documents available in NUŠL including theses, reports, studies, and more. It describes how to search NUŠL freely and without registration. Users can search by keyword, limit by category, author, or time period. It explains the different ways a full document can be accessed either within NUŠL or through links to other repositories. Contact information is provided for help or to attend seminars on grey literature.