Officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent. It's big international cities : Sydney, Melbourne, Brisbane and Perth.
Officially the Republic of Singapore, is a city-state and island country in Southeast Asia. Singapore is a global hub for education, finance, healthcare, tourism, trade, transport etc.
Officially the Federation of Malaysia or Malaysia Federation is a country in Southeast Asia. It's international popular destination : Kuala Lumpur (KL), Penang, Malaka etc.
Commonly known as the United States of America (USA), ranks highest socio-economic performance, the foremost military power in the world, and a leading political, cultural, scientific internationally.