ONB

Depending on context, the initialism ONB may have several meanings:

• Old National Bancorp, stock symbol (an American holding company of Old National Bank)
• One Network Bank, a rural bank in Mindanao, Philippines
• Opera Nazionale Balilla, an Italian Fascist youth organization
• Order of New Brunswick, a Canadian decoration (post-nominal letters)
• Orthonormal basis, a notion in Linear Algebra

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