On the broad level, we can classify Olympiad organizations at two levels.
First category of Olympiads are organized by the government institutes
Second category of Olympiads are is which are organized by the private organizations
Both organizations organize the Olympiads for various subjects at school level, like English, General Knowledge, computer Science, Maths, physics, Chemistry.
Some of the well know private Olympiads are SOF, Silver Zone Olympiad, CREST Olympiad, Unicus Olympiad, Unified Council.
Prestigious Olympiads organized by government organizations are IOQM, NSEP, NSEC, INMO, INPO, INCO, NMTC, ICO, NSEJS etc most of these leading the way for International Olympiads dream of every student
