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Southeast Asia two major parts are: Malay Peninsula and Indonesia Archipelago.

Malay Peninsula. A peninsula in southeastern Asia occupied by parts of Malaysia, Thailand and Myanmar.

Indonesia Archipelago.

Indonesia is the largest archipelago and the forth populous country in the world, consisting of five main islands namely Sumatra, Java, Kalimantan, Sulawesi and Papua. It has a total of 17,508 islands, among which 6,000 are inhabited.