Object-Oriented Process, Environment, and Notation (OPEN Consortium)面向对象的过程、环境、符号(打开联盟) One Planet Education Network一个星球网络教育 Oregon Public Education Network俄勒冈州公共网络教育 Oncovin, Prednisone, Etoposide, NovantroneOncovin、强的松,Etoposide,Novantrone Online Public Education Network在线公共教育网络 Origins of Plasma in the Earth's Neighborhood在地球上的起源的等离子体的左邻右舍 Optical Pan-European Network泛光网络 Olympic and Paralympic Employment Network (UK)奥运会及残奥会就业网络(英国) Open Protocol Enhanced Networks加强网络打开协议 Olympic and Paralympic Employment Network奥运会及残奥会就业网络 Open-Car Pleasure and Entertainment NetworkOpen-Car快乐和娱乐的网络 Online Park Enrollment Network网络在线公园招生 Orphan Pets Enjoy Nature孤儿的宠物享受大自然 Objects, Process, Environment, and Notation对象、过程、环境和符号