>Vedas
There are 4 Vedas -
>Rig Veda
>Sama Veda
>Yajur Veda
>Atharva Veda
The first 3 Vedas are jointly called "Vedatrayi" i.e. the trio of Vedas
>Of the four Vedas Rig Veda (Collection of lyrics) is the oldest text in the World, and, therefore, is also known as 'the first testament of mankind'
>Rig Veda
Contains 1028 hymns and 10,580 verses, divided into 10 mandalas.
Six mandalas (from 2nd - 7th) are called Gotra/Vamsha Mandalas (Kula Granth)
The 1st and 10th mandalas are said to be added later.
The 10th mandala contains the famous Purushasukta which explains the 4 Varnas -
>Brahmana
>Kshatriya
>Vaishya
>Shudra
Hymns of Rig Veda are recited by Hotri (A type of priest)
>Sama Veda
Book of chants having 1549 verses
All verses (excluding 75) were taken from Rig Veda.
Hymns of Sama Veda are recited by Udgari (A type of priest priest)
This Veda is important for Indian music
>Yajur Veda
Book of sacrificial prayers, is a ritual veda
Its hymns are recited by Adhvaryus (A type of priest)
It is divided into two parts-
>Krishna Yajur Veda
>Shukla Yajur Veda
In contrast to the first two which are in verse entirely, this ones in both verse and prose
>Atharva Veda
Book of magical formulas and spells and the last one
Contains charms and spells to ward off evils and diseases
For a very long time it wasn't included in the category of Vedas.