- index breeding
- index calculus
- index-calculus
- Index Catalogue of Nebulae and Clusters of Stars
- index class
- index comparison method
- index control of land for the construction of industrial projects
- index correction
- index diagram
- indexed
- indexed algebraic system
- indexed family
- indexed function
- indexed grammar
- indexed plan
- indexed set
- indexed set of elements
- indexed system of sets
- index ellipsoid
- indexer
- index error
- indexes of crop irrigation
- indexes of national economic management
- index evaluation method
- index file retrieval tools