I think I know where your heading with this.
Each country issues it's own passport. e.g. US Passport, Indian Passport, Egyptian Pasport etc
To travel to other countries you need a visa. A visa is issued by the embassy of the country you wish to visit. The reason for a visa is that it gives the country you wish to travel, the chance to check for a criminal record, links to terrorist organisiations and your potential risk overstaying your stay (illegal migration).
Then there are different types of visa's. For examply for America, a Tourist Visa is called a B1 Visa, a Business Visa is a B2 (these are usually combined), a student visa is a J1 and on it goes.
I hope this answers your question.
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