| Acta Neurobiologiae Experimentalis | ACTA NEUROBIOL EXP | 0065-1400 |
| Acta Neurochirurgica | ACTA NEUROCHIR | 0001-6268 |
| Acta Neurochirurgica, Supplement | ACTA NEUROCHIRURGICA, SUPPLEMENT | 0065-1419 |
| Acta Neurologica Belgica | ACTA NEUROL BELG | 0300-9009 |
| Acta Neurologica Scandinavica | ACTA NEUROL SCAND | 0001-6314 |
| Acta Neurologica Taiwanica | ACTA NEUROLOGICA TAIWANICA | 1028-768X |
| Acta Neuropathologica | ACTA NEUROPATHOL | 0001-6322 |
| Acta Neuropathologica Communications | ACTA NEUROPATHOLOGICA COMMUNICATIONS | 2051-5960 |
| Acta Neuropsychiatrica | ACTA NEUROPSYCHIATR | 0924-2708 |
| Acta Neuropsychologica | | 1730-7503 |
| Acta Numerica | ACTA NUMERICA | 0962-4929 |
| Acta Obstetricia et Gynecologica Scandinavica | ACTA OBSTET GYN SCAN | 0001-6349 |
| Acta Oceanologica Sinica | ACTA OCEANOL SIN | 0253-505X |
| Acta odontologica latinoamericana : AOL | ACTA ODONTOLOGICA LATINOAMERICANA : AOL | 0326-4815 |
| Acta Odontologica Scandinavica | ACTA ODONTOL SCAND | 0001-6357 |
| Acta Oecologica | ACTA OECOL | 1146-609X |
| Acta Oeconomica | ACTA OECON | 0001-6373 |
| Acta Oeconomica Universitatis Selye | ACTA OECONOMICA UNIVERSITATIS SELYE | 1338-6581 |
| Acta of Bioengineering and Biomechanics | ACTA BIOENG BIOMECH | 1509-409X |
| Acta Oncologica | ACTA ONCOL | 0284-186X |
| Acta Onomastica | | 1211-4413 |
| Acta Ophthalmologica | ACTA OPHTHALMOL | 1755-375X |
| Acta Ophthalmologica Scandinavica | | |
| Acta Ophthalmologica Scandinavica | ACTA OPHTHALMOL SCAN | 1395-3907 |
| Acta Organologica | | 0567-7874 |
| Acta Orientalia | | 0001-6438 |
| Acta Orientalia Academiae Scientiarum Hungaricae | | 0001-6446 |
| Acta Ornithologica | ACTA ORNITHOL | 0001-6454 |
| Acta Orthopaedica | ACTA ORTHOP | 1745-3674 |
| Acta Orthopaedica Belgica | ACTA ORTHOP BELG | 0001-6462 |
| Acta Orthopaedica et Traumatologica Turcica | ACTA ORTHOP TRAUMATO | 1017-995X |
| Acta Ortopedica Brasileira | ACTA ORTOP BRAS | 1413-7852 |
| Acta Oto-Laryngologica | ACTA OTO-LARYNGOL | 0001-6489 |
| Acta Oto-Laryngologica Case Reports | ACTA OTO-LARYNGOLOGICA CASE REPORTS | 2377-2484 |
| Acta Otorhinolaryngologica Italica | ACTA OTORHINOLARYNGO | 0392-100X |
| Acta Otorrinolaringologica Espanola | ACTA OTORRINOLARINGOLOGICA ESPANOLA | 0001-6519 |
| Acta Paedagogica Vilnensia | ACTA PAEDAGOGICA VILNENSIA | 1392-5016 |
| Acta Paediatrica, International Journal of Paediatrics | ACTA PAEDIATR | 0803-5253 |
| Acta Palaeobotanica | | 0001-6594 |
| Acta Palaeontologica Polonica | ACTA PALAEONTOL POL | 0567-7920 |
| Acta Paleobotanica International Journal of Paleobotany and Palynology | | |
| Acta Parasitologica | ACTA PARASITOL | 1230-2821 |
| Acta Paulista de Enfermagem | ACTA PAUL ENFERM | 0103-2100 |
| Acta Pediatrica de Mexico | ACTA PEDIATRICA DE MEXICO | 0186-2391 |
| Acta Pediatrica Espanola | ACTA PEDIATRICA ESPANOLA | 0001-6640 |
| Acta Pedologica Sinica | ACTA PEDOLOGICA SINICA | 0564-3929 |
| Acta Periodica Technologica | ACTA PERIODICA TECHNOLOGICA | 1450-7188 |
| Acta Petrologica Sinica | | 1000-0569 |
| Acta Pharmaceutica | ACTA PHARMACEUT | 1330-0075 |
| Acta Pharmaceutica Hungarica | ACTA PHARMACEUTICA HUNGARICA | 0001-6659 |