OPN

OPN is a three-letter acronym that may stand for:

• Osteopontin, a glycoprotein secreted by osteoblasts
• Object Process Network, a simulation model meta-language
• Other Procurement, Navy, a funding appropriate category
• Optics & Photonics News, a magazine
• OpenPHPNuke, a content management system
• In Catholicism, OPN is ora pro nobis (pray for us).
• It also stands for Ordering Part Number on AMD CPUs
• In modern medicine of Japan, OPN stands for operation nurse (オペ看,) specializes in managing and delivering surgical tools to surgeon.

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