Acta Palaeontologica Polonica《波兰古生物学学报》（季刊）. ACTA PALAEONTOLOGICA POLONICA is an international quarterly journal publishing papers of general interest from all areas of paleontology. Since its founding by Roman Kozłowski in 1956, various currents of modern paleontology have been represented in the contents of the journal, especially those rooted in biologically oriented paleontology, an area he helped establish.

Acta Otorhinolaryngologica Italica《意大利耳鼻喉科学报》（双月刊）. Acta Otorhinolaryngologica Italica first appeared as “Annali di Laringologia Otologia e Faringologia” and was founded in 1901 by Giulio Masini. It is the official publication of the Italian Hospital Otology Association (A.O.O.I.) and, since 1976, also of the Società Italiana di Otorinolaringoiatria e Chirurgia Cervico-Facciale (S.I.O.Ch.C.-F.).

Acta Oto-Laryngologica《耳鼻喉科学报》（月刊）. Acta Oto-Laryngologica is a truly international journal for translational otolaryngology and head- and neck surgery. The journal presents cutting-edge papers on clinical practice, clinical research and basic sciences. Acta also bridges the gap between clinical and basic research.

Acta Ortopédica Brasileira《巴西骨科学报》（双月刊）. Acta Ortopédica Brasileira journal, an Official Body of the Departamento de Ortopedia e Traumatologia da Faculdade de Medicina da Universidade de São Paulo (DOT/FMUSP), is published bimonthly, in six editions per year (Jan/Feb, Mar/Apr, May/Jun, Jul/Aug, Sept/Oct and Nov/Dec) with English, being currently recognized as a major contribution to this specialty of medicine due to its high level of commitment and hard work towards indexations to which it has been accepted.

Acta Orthopaedica et Traumatologica Turcica《骨科与创伤外科学报》（双月刊）. Acta Orthopaedica et Traumatologica Turcica (AOTT) is an international, scientific, open access periodical published in accordance with independent, unbiased, and double-blinded peer-review principles. The journal is the official publication of the Turkish Association of Orthopaedics and Traumatology, and Turkish Society of Orthopaedics and Traumatology. It is published bimonthly in January, March, May, July, September, and November. The publication language of the journal is English.

Acta Orthopaedica Belgica《比利时骨科学报》（季刊）. The Acta Orthopaedica Belgica was born in 1945. Since 1984 "peer review" has been used. Since 1992 the non-profit organization Acta Orthopaedica Belgica has directed the journal. The board is composed of delegates from French- and Dutch-speaking orthopaedic associations. The members of the Editorial Board are appointed for 4 years.

Acta Orthopaedica《骨科学报》（一年1卷）. Acta Orthopaedica is an open access peer reviewed journal that publishes basic and clinical research in the field of orthopedics and related sub disciplines. The journal is owned by the Nordic Orthopaedic Federation and is the official publication of this federation.

Acta Ornithologica《鸟类学学报》（半年刊）. Acta Ornithologica publishes scientific papers (original research reports, reviews, short notes, etc.) and announcements from all fields of ornithology. It is open for authors from all countries. The language of papers is English (with Polish summaries). All manuscripts are peer-reviewed.

Acta Ophthalmologica《斯堪的纳维亚眼科学报》（一年8期）. Acta Ophthalmologica is published on behalf of the Acta Ophthalmologica Scandinavica Foundation and is the official scientific publication of the following societies: The Danish Ophthalmological Society, The Finnish Ophthalmological Society, The Icelandic Ophthalmological Society, The Norwegian Ophthalmological Society and The Swedish Ophthalmological Society, and also the European Association for Vision and Eye Research (EVER).

Acta of Bioengineering and Biomechanics《生物工程与生物力学学报》（季刊）. Acta of Bioengineering and Biomechanics is a platform allowing presentation of investigations results, exchange of ideas and experiences among researchers with technical and medical background. Papers published in Acta of Bioengineering and Biomechanics may cover a wide range of topics in biomechanics, including, but not limited to: Tissue Biomechanics, Orthopedic Biomechanics, Biomaterials, Sport Biomechanics.