Schengen Convention took place in 1990 in Luxembourg then they named Schengen visas. There are 28 European countries in Schengen area which are agreed to abolish border controls that belong to Schengen Agreement. There are mainly 4 Non-European Union, and they are named as Norway , Iceland, Switzerland and Lichtenstein. Schengen Agreement and Schengen Visa are for the purpose to allow free movement between the countries in the Schengen region. So that people can travel without any difficulties across the borders to work and settle freely.
There are different programs for different countries that which are part of European Union. Each country has their own EU immigration process. The EU immigration had undergone some renovations, so it is important for citizens who wish to work and settle in European countries have to know more about individualized EU immigration programs. Some immigration services are time-based on the study and work. Citizenship in EU countries is given only for people born in European Countries, family relations, marriage and for long-term residency. Citizens who decided to work and settle can legally settle with a foreign citizenship and a passport. A person holding European Union nationality of a member state is a citizen of the European Union. On the off chance, a person who becomes a citizen in any one of the country out of 28 European countries, the person is granted citizenship with all the 28 European Countries. That means the individuals have the rights to live anywhere in 28 European countries. For example, a citizen in Sweden who has moved and retired to Norway can vote where they reside.