What Countries Are Normally Said To Be Third World Countries?

Third Word is a name sometimes given to economically developing countries, particularly those in Asia, Africa, and Latin America. The term Third World is also used for politically neutral countries. Such countries are also called neutral nations or nonaligned nations because they do not regularly support either the First World or the Second World. The First World is said to consist of the United Status and other communist industrial nations.
The second world refers to Russian Federation and the communist countries of Eastern Europe.

Some political experts consider China a third world country, but others disagree. The Third World consists of about 120 countries, which have more than half the world's population. Most Third World countries are former colonies of Western European nations and have gained their independence since 1945. Although Third World countries frequently have similar goals, they actually represent different and sometimes opposing political and nomic systems.

Pakistan is also a member of nonaligned movement the organization of Third world countries.Nonaligned Movement (NAM) was established on 1-6 September 1961. Its aim is to establish and military Cooperation apart from the traditional East or West block.

Unfortunately  (my explanation and you can think about it).. all countries were under occupation during the 20th century.

for example .. all Africa, Arab countries, Latin america, Asia (without Russia or former USSR).

It is also Italian term, "Terso Mondo". (Terso the 3rd and last and worst class of trains).

There is also a more behaved term .. "Developing Countries".

By the way it is political term, not Geographical.