Geography
SEA is geographically divided into 2 subregions:
Mainland SEA – the area located in the east of India and in the south of China: Myanmar, Thailand, Laos, Cambodia, Vietnam, and Malaysia (East Malaysia is located on Borneo).
Maritime SEA (also known as “Island Southeast Asia" or "Insular Southeast Asia" – archipelago (groups of island) in seas, Indian Ocean, and Pacific Ocean: Philippines, Indonesia, Singapore, Brunei, and Timor-Leste (currently not ASEAN member).