The Encarta Thesaurus encompasses over 350,000 synonyms and antonyms, more than 1,200 themes listing more than 50,000 related terms, and many words from information technology, e-commerce and the media. The first section of the book, an alphabetical list of 40,000 entries, provides quick reference lists of synonyms. These double as an index to a completely new system of categories in the second section. The categories have headings such as ’The Way Things Are or Seem to Be’ or ’Emotions and States of Mind', reflecting the way language works at the start of the 21st century.