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There are 6 different meanings of OPN.

OPN Disambiguation
Catholicism
9 products, approx. 176 pages
In Catholicism, OPN is ora pro nobis (pray for us).
Optics & Photonics News
1 product, approx. 8 pages
Optics & Photonics News, a magazine
Three-letter acronym
1 product, approx. 3 pages
OPN is a three-letter acronym that may stand for:
Content management system
1 product, approx. 2 pages
OpenPHPNuke, a content management system
It also stands for Ordering Part Number on AMD CPUs



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