Upanishad classified.

Veda	Samhita	Brahmana	Aranyaka	Upanishad
Rk	Shakala	Aitareya		Aitareya, Kaushitake, NadaBindu, Atma Bodha, Nirvana
Veda	Bashkala	Kausitaki	Aitareya	Mudgala, Ashamalika, tripura, soubhagya Bahvicha.
Sama	Gauthama	Tandamaha		Kena, chandogya, Aruni, Maitrayana, Maitreyi,
Veda	Jaiminia	sadvimsa	jaimineya	vajrasuchika, yoga chudamani, Vasudeva,
		Jaimineya		Mahatsanyasa Avyakta, Kaundika, savitri, rudraksha
				Jabala, Darsana Jabali.
Krishna	Taittriya			Katha, taittriya, Brahma, Sverasvatara, garbha,
Yajur	Kata	Taittriya	taittriya	Narayana, Amritabindu,Atrita nanda, Kalagnirudra,
Veda	Kataka			Kshurika, sarvasara, Sukarahasya, Tejo bindu,
	Maitrayaneya			Dhyana bindu, Brahma vidya, Yoga tattva,
				Dakshinamurti, Skanda, Sariraka, Sikha, Ekakshara,
				Akshi, Avadhuta, Kara, Rudrahridaya, Yoga kundalini,
				Panchabrahma, Pranaagnihotra, varaha, Kalisantarana,
				Sarasvatirahasya.
Sukla	Mahayandina	Satapata		Isa, Brhadaranyaka, Jabala, Hamsa, Subala, Mantrika
Yajur	Kanwa			Niralamba, trisikhi Brahmana, mandala Brahmana Adwya,
Veda				Taraka, Paingala, Bhikshu, Triyatita, Adhyatma, Tarasara,
				Yajnavalkya satyayani, Muktika
Atharva	Paiplaya	Gopatha		Prasna, Mundaka, Mandukya, Atharvasira, Ataravasikha
Veda	Sownaka			Brhtjabala, Nrsimhatapani, Narada Parivrajaka, sita,
				Sarabha, Mahanarayana, Ramarahasya, Ramatapani,
				Sandilya, Paramahamsa, Parivrajaka, annapurna surya,
				Atma, Pasupata, Parabrahma, Tripuratapani, Devi,
				Bhavana, Bhasmajabala, Ganapati, Mahakavya,
				gopalatapani, Krshna, Hayagriva, dattatreya, garuda.