BECK index Vedas and Upanishads Harappan Civilization Rig Veda Sama Veda Yajur Veda Atharva Veda Brahmanas Aranyakas Early Upanishads Kena, Katha, Isha, and Mundaka Later Upanishads Harappan Civilization Although they did use some writing with pictographic symbols at Mohenjo-daro, they were not extensive nor alphabetic nor have they been deciphered yet, and the Indo-European Sanskrit which did ...
www.san.beck.org/EC7-Vedas.html
The word Upanishad consists of three words Upa means near , ni means down and shad means be seated . So, Upanishad means, be seated at the feet of the Guru to receive the teaching. The Upanishads constitute what we call the Vedanta (Veda-anta), the end of the Vedas, not merely because they constitute the last part of them, but above all because they are their ultimate teachings, ...
This is a detailed essay on the Upanishads, one of the types of source texts of Vedanta, giving relevant quotes and background information.
www.dvaita.org/shaastra/upanishad.html