Principal Upanishads

Aitareya Upanishad

Brihadaranyaka Upanishad

Chandogya Upanishad

Isavasya Upanishad

Katha Upanishad

Kaushitaki-Brahmana Upanishad

Kena Upanishad

Maitrayani Upanishad

Mandukya Upanishad

Mundaka Upanishad

Prasna Upanishad

Svetasvatara Upanishad

Taittiriya Upanishad