Classification

Here is another classification scheme, the Optics Classification and Indexing Scheme (OCIS).

The Optical Society of America (OSA) is pleased to present the Optics Classification and Indexing Scheme (OCIS). OCIS provides a flexible, comprehensive classification system for all optical author input and user retrieval needs.

OCIS has a two-level hierarchical structure containing 36 main headers and approximately 700 sub-categories.