Vedas divisions

Each Veda consisted of 2 parts. The first 3/4th of the Veda is Karma Kanda and the last 1/4th is the Gnana Kanda. Karma Kanda deals in detail about the Mantras and the rituals to be performed. While the Gnana Kanda deals with the description of the Supreme God known as the Para Brahman or the Virat Purasha.  Karma kanda has 2 divisions namely Samhita (Mantras) and Brahmanas (ritualistics). And Gnana Kanda has 2 divisions namely Aranyakas (Contemplative) and Upanishads (Highest philosophical thoughts).  Each of the 4 Vedas have its own Upanishads.