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the Eastern Orthodox Church and the Roman Catholic Church
Eastern Orthodox
Anyone other than Eastern Orthodox eg Oriental Orthodox, Catholic, Protestant
Roman Catholic, Eastern Orthodox, and Protestant.
I believe their are about 75 books in the Eastern Orthodox bible. Below is a link to Wikipedia. org that shows the different books, their names, and whether or not they are from the Jewish, Protestant, Catholic, and/or Eastern Orthodox traditions (they also list the original language it was written in).
The Eastern Orthodox Church uses the Bible. The books in their Canon are slightly different than that of the Roman Catholic, but they also use 3 Maccabees, Psalm 151, and 1 Esdras.
The Eastern Orthodox religions
Roman Catholic, Protestant, Eastern Orthodox
Eastern Orthodox Christianity, Christianity, and Catholic.
The oriental orthodox,eastern orthodox and roman catholic churches all started when various apostles spread mainly the middle east and eastern Europe. Soon the churches started to split the oriental orthodox then eastern orthodox and catholics together. Its hard to say when oriental orthodox started because it consists of several apostolic churches in communion which each other all founded at different times by different apostles
That's a long an complicated question. The short answer is the Roman Catholic Church celebrates most holidays on the Western Calendar while the Eastern Orthodox use a slightly different calendar known as the Eastern Calendar. Some years the dates are the same and others they are different. The Roman Catholic Church structure is similar to the Eastern Orthodox. However, the Eastern Orthodox setup a church in each country (generally, America being one notable exception) whereas the Roman Catholics have a world wide structure.
There are Eastern or Byzantine Rite Catholics but they are in full union with Rome as opposed to the Eastern Orthodox Churches which are not. There was a brief period in the 20th century, when a separate Orthodox Church broke away from the Eastern Orthodox Church in America and formed the America Orthodox Catholic Church. But it was yet another splinter of an already splintered Church. orthodox (small "O") means right belief, and thus is synonymous with Catholic. Now, there is also an Orthodox Catholic Church of America, also not in Communion with the Catholic Church. . You may read about the American Orthodox Catholic Church at the links below.