OPN

OPN may stand for:

• Osteopontin, a glycoprotein secreted by osteoblasts
• Object Process Network, a simulation model meta-language
• Optics & Photonics News, a magazine
• Oneohtrix Point Never, recording alias of musician Daniel Lopatin
• Olivary pretectal nucleus, a nucleus in the pretectal area, or pretectum
• In mathematics, odd perfect number
• Ora pro Nobis, Latin phrase litt. meaning "pray for us", often abbreviated as OpN in prayer books and breviaries
• FM Operator Type-N, a series of sound chips made by Yamaha:
  • YM2203 (OPN)
  • YM2608 (OPNA)
  • YM2610 (OPNB)
  • YM2612 (OPN2)
  • YMF288 (OPN3)

This disambiguation page lists articles associated with the title OPN.
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