To start, a highly developed country is a general category for countries that are highly industrialized and have high per capita income levels, and a developing country is a general category for countries that have limited industrialization and have low per capita income levels. source

Berdasarkan definisi di atas:
1. Jepang masuk negara maju
2. Negara teluk tidak masuk negara maju
3. Korea hampir masuk kali ya. Tapi sudah lama jadi upper middle income countries
4. Indonesia belom keduanya.
5. Negara khilafah tuh yang mana ya?
6. Contoh2 negara maju paling gampang ya liat anggota2 OECD