There are the three Vedas, The Rgveda, Yajurveda, Atharvaveda and Sámaveda which is a compilation of songs from the three vedas.
The oldest portion of the Vedas, that is, the Rgveda, was composed between 15, 000 and 10,000 years ago outside India in the Caucasus and can be regarded as an ancient relic of the non-Indian Aryan civilization.
<<These nomadic Aryans, on coming in contact with the different groups of people of Iran, Afghanistan and northwest India, took up farming and developed the techniques of strategic warfare. The impact of this new thought bred in them, to some extent, a refined intelligence.>>
The Yajurveda was composed between 10,000 and 7000 years ago by a this branch of the Vedic Aryans whom we can all the Indo-Aryans <<The Yajurveda was composed in Iran (Áryańya Vraja), Afghanistan (Gándhár), northwest India and certain parts of what is modern Russia (Shákadviipa), so it cannot be called entirely non-Indian, particularly since the then Afghanistan and certain parts of Russia were regarded as part of India at that time.>>
<<The Yajurveda was chiefly concerned with rituals and secondly with a blend of rituals and knowledge. The word yajuh means “that in which rites are predominant.” >> At the same time <<the Yajurvedic era saw the all-round development of these people, and the resultant development was the Brahmaváda – the doctrine of monotheism. During this era not only was there a noticeable intellectual development among the general mass of the Aryans; among the munis [intellectuals or seers] and the rśis, philosophy and spirituality also attained a brilliant height of expression. The Brahmaváda of the Yajurveda was a lot deeper and clearer than that of the Rgveda.>>
<<The Atharvaveda was composed between 7000 and 5000 years ago << in Afghanistan and India. It was named after the great sage, Atharva, the first author of this Veda. He was most likely from Central Asia, but this is not to say that one can say for certain that he was not an original inhabitant of India. Still, there is no doubt that the propounders of the later portions of the Atharvaveda were inhabitants of India, especially Maharśi Vaedarbhi because Vidarbha was the name of a settlement in the central-western portion of India.>>
<< During the composition of this Veda the Aryans came in close contact with the non-Aryans, resulting in an exchange of thought between the two. The Tantra of the non-Aryans had a marked influence on the Atharvaveda. Being non-Aryan, the Atharvaveda cannot be regarded as a representation of Aryan civilization. In the subtle philosophy of the Atharvaveda, particularly of the Nrsiḿha Tápańiiya Shruti, there is a far greater influence of the non-Aryan Tantra than of the Aryan Veda.>>
<<The Sámaveda is not a Veda at all. The word sáma means “song”. The Sámaveda was made later on from the music portions of the three Vedas, that is, the Sámaveda is found within the Rgveda, Yajurveda and Atharvaveda. When they used to sing in the name of (the deities) Úśa, Indra, Parjanya, Mátarishvá, Varuńa, that singing was called sáma. >>
Text in brackets <<>> by Shrii PR Sarkaar