This type of keyword-based system was based on the keyword systems used by common research databases of the 1990s, such as Knowledge Index and CompuServe's file library, and is similar to the keywords Index for a MS Help file.
Science Citation Index | Human Development Index | Roud Folk Song Index | Index Ventures | Tree of Knowledge | Knowledge Adventure | index | knowledge | Index term | Index on Censorship | Index Librorum Prohibitorum | Society for Promoting Christian Knowledge | LuxX Index | Knowledge Discovery Metamodel | Index (publishing) | Index (database) | Index | FTSE 250 Index | Cook Partisan Voting Index | AEX index | A Certain Magical Index | Web of Knowledge | Tree of Knowledge (film) | The Secret Knowledge | Stock market index | stock market index | Precious Knowledge | Miller index | Knowledge Network | Knowledge Is Power Program |