The united states, japan, and france are classified as developed countries because

These countries are classified as developed because they have a developed economy and an advanced technological infrastructure.

The main factor in evaluating a country's economic position is the gross domestic product ( GDP ), the per capita income and the general living standard.

Most developed countries have post-industrial economics, meaning that the service sector provides more wealth than the industrial sector.

Developed countries contrast with developing countries, which are agrarian or in the process of industrialization.

The largest advanced economics by GDP and thus the most developed countries in the world are Australia, Canada, France, Italy, Japan, United Kingdom and United States.