PART ONE - FOCUS ON KEYWORDS: Online Searching; Basic Commands; Bibliographic Databases - Structure and Content, Non-Index Fields, Index Fields, Search Outline, Search Terms; Full Text Files; Patent Information; Special Topics; PART TWO - FOCUS ON SUBSTANCES: Chemical Substances - Structure and Indexing; Finding Substances - Name Based Terms, Formula Based Terms; How Structure Searching Works; Searching by Structure; Substance Files with Property Information; Searching for Chemical Reactions.