Here are the commonly used “9 Upvās/ Tap” names (Śvetāmbara lay practice):

1) Upvās (complete fast; with boiled water during the day) 2) Tivihār Upvās (no food after previous sunset; water allowed till sunset) 3) Chauvihār Upvās (no food and no water from previous sunset till next sunrise) 4) Ekāsan (one sitting, one meal; boiled water only) 5) Biyāsan (two sittings/meals; boiled water only) 6) Āyambil (one very simple, spice‑less, oil‑less meal; boiled water only) 7) Chhath (two consecutive Upvās) 8) Attham (three consecutive Upvās) 9) Atthai (eight‑day fast; traditionally during Oli or special vrats)

Notes for authenticity:

• In scriptures, Tap is classified mainly as six external and six internal austerities; the above nine are popular lay variants grouped for practice, not a separate scriptural list.
• Digambara usage is similar in spirit; names may vary slightly (e.g., nirjal upvās, ekabhukti, dvibhukti, ayambila, atthai, masakṣamaṇa). Focus remains on restraint, simplicity, and right conduct.

For brief guidance on Upvās pledge and Tap, see:

• Upvās nu Pachkhan
• Samyag Tap (Navpad) overview
• Types of Tap (Tap na bhed)