Oopic is a professional website for downloading business materials, offering a variety of resources such as PPT templates, AE templates, and office document materials.

A library catalog for the National Museum in Krakow, offering a platform to search, reserve, and borrow books, audiobooks, and e-books.

online catalog of the Trier City Library

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The company focuses on academic publishing in the field of optics, offering journals, papers, and resources for optical research and collaboration.

THE OPEN DOOR BOOKSHOP has operated in Rome, Italy for more than twenty years. Its name, as well as trying to express a cordial welcome to all book lovers, intends to testify to an open mind and a consuming curiosity for ideas of all kinds. We are attracted by the unusual and even the bizarre. The search for books is for us a treasure hunt among old, antiquarian and even new books. When we find these things we take them in English, Italian, French, German and Spanish. What it may contain tomorrow is anyone's guess. If you do not find what you are looking for in the catalog send us an e-mail and we will try to find it for you.

OpenSchoolbag is Singapore's online marketplace for education resources, offering a variety of educational materials for primary and secondary levels.

Manufacturing personalized diaries and notebooks. Experts in promotional gifts

China Children's Opera Education Network, Peking Opera Enlightenment National Essence Inheritance Project, Beijing Children's Peking Opera and Kunqu Art Education Society official website.

OPITEC - the innovative partner for schools, kindergartens, hobbyists and creatives. Mail order for consumables in schools, technology and kindergartens.