Ophthalmic Epidemiology《眼科流行病学》（双月刊）. Ophthalmic Epidemiology is dedicated to the publication of original research into eye and vision health in the fields of epidemiology, public health and the prevention of blindness. Ophthalmic Epidemiology publishes editorials, original research reports, systematic reviews and meta-analysis articles, brief communications and letters to the editor on all subjects related to ophthalmic epidemiology.

Ophthalmic and Physiological Optics《眼科光学与生理光学》（双月刊）. Ophthalmic & Physiological Optics (OPO) is a leading international, interdisciplinary journal that addresses basic and applied questions pertinent to contemporary research in vision science and optometry. OPO publishes original research papers, reviews, short communications and letters to the Editor and will interest researchers, educators and clinicians concerned with the development, use and restoration of vision.

Operators and Matrices《算子与矩阵》（季刊）. Operators and Matrices (OaM) aims towards developing a high standard international journal which will publish top quality research and expository papers in matrix and operator theory and their applications. The journal will publish mainly pure mathematics, but occasionally papers of a more applied nature could be accepted. OaM will also publish relevant book reviews.

Operative Techniques in Sports Medicine《运动医学的手术技巧》（季刊）. Operative Techniques in Sports Medicine combines the authority of a textbook, the usefulness of a color atlas and the timeliness of a journal. Each issue focuses on a single clinical condition, offering several different management approaches. Its the easiest way for practitioners to stay informed of the latest surgical advancements and developments.

Operative Orthopädie und Traumatologie《骨科手术与创伤学》（双月刊）. Die Operative Orthopädie und Traumatologie wendet sich an alle operativ tätige Ärztinnen und Ärzte im Bereich der Orthopädie, Traumatologie, Allgemeinchirurgie, Handchirurgie, Sportmedizin, Ärztinnen und Ärzte anderer chirurgischer Fachrichtungen sowie niedergelassenen Unfallchirurginnen und -chirurgen, Orthopädinnen und Orthopäden sowie Rheumatologinnen und Rheumatologen, die zur Patientenberatung und Operationsvorbereitung wie auch zur Nachsorge fundierte Informationen zu aktuellen Operationsmethoden benötigen.

Operative Neurosurgery《神经外科手术》（月刊）. Operative Neurosurgery (ONS), a companion publication to Neurosurgery from the Congress of Neurological Surgeons, complements the clinical and research studies published in Neurosurgery by featuring technical material that highlights operative procedures, anatomy, instrumentation, devices, technology. ONS is the practical resource for cutting-edge material that connects the surgeon directly to the operating room.

Operative Dentistry《牙体修复学》（双月刊）. Operative Dentistry is a refereed, international journal published bi-monthly and distributed to subscribers in over 50 countries. Papers are submitted by authors from around the globe, in the categories of Clinical Research, Laboratory Research, Clinical Techniques/Case Presentations and Invited Papers, as well as Editorials and Abstracts.

Operations Research Perspectives《运筹学动态》（半年刊）. Operations Research Perspectives is an exciting new open access journal in the field of Operations Research and Management Science. It provides a dedicated and safe environment for open access research, with fast online publication on ScienceDirect for all accepted papers.

Operations Research Letters《运筹学快报》（双月刊）. Operations Research Letters promises the rapid review of short articles on all aspects of operations research and analytics. ORL welcomes pure methodological papers and applied papers with firm methodological grounding.

Operational Research《运筹学》（季刊）. Operational Research - An International Journal (ORIJ) publishes high quality scientific papers that contribute significantly to the fields of operational research/management science (OR/MS) and business analytics. ORIJ focuses on papers presenting new theoretical insights and developments as well as real-world case studies illustrating the implementation of OR approaches in practice.