Index

Index can have the following meanings:

• An index in the sense of an ordered list has the plural form indexes.
• An index in the sense of a number or variable has the plural indices.
• The city -- Index, Washington, United States
• Publishing purposes; see Index (publishing)
• Information Technology (IT) purposes; see Index (information technology) or Index (database)
• index.html or index.htm, the default file served by web servers.
• Mathematics; see Index (mathematics)
• Economics and Finance; see Index (economics)
• In Roman Catholicism the Index is the Index librorum prohibitorum created in 1559, the list of books that obedient Catholics were forbidden to read.
  • This meaning has been extended to book censorship by some political regimes.