Om - in Jainism

In Jainism

In Jainism, om is regarded to be a condensed form of reference to the Pañca-Parameṣṭhi, by their initials A+A+A+U+M (o3m). The Dravyasamgraha quotes a Prakrit line:

ओम एकाक्षर पञ्चपरमेष्ठिनामादिपम् तत्कथमिति चेत "अरिहंता असरीरा आयरिया तह उवज्झाया मुणियां"

oma ekākṣara pañca-parameṣṭhi-nāmā-dipam tatkabhamiti ceta "arihatā asarīrā āyariyā taha uvajjhāyā muṇiyā"

"Om" is one syllable made from the initials of the five parameshthis. It has been said: "Arihant, Ashiri, Acharya, Upajjhaya, Muni" .

Thus, ओं नमः (oṃ namaḥ) is a short form of the Navkar Mantra.