8,422 titles
| Ablak | 1990-1992 | Odorheiu Secuiesc, Romania |
| Academia Cațavencu | 1993-2017 | Bucharest, Romania |
| Acta Agronomica | 1950-1994 | Budapest, Hungary |
| Acta Alimentaria | 1972-1995 | Budapest, Hungary |
| Acta Antiqua | 1951-1995 | Budapest, Hungary |
| Acta Archaeologica | 1951-1995 | Budapest, Hungary |
| Acta Biochimica et Biophysica | 1966-1991 | Budapest, Hungary |
| Acta Biologica | 1950-1995 | Budapest, Hungary |
| Acta Botanica | 1954-2000 | Budapest, Hungary |
| Acta Chimica | 1951-2000 | Budapest, Hungary |
| Acta Chirurgica | 1960-1999 | Budapest, Hungary |
| Acta Classica Universitatis Scientiarum Debreceniensis | 1965-2013 | Debrecen, Hungary |
| Acta Ethnographica | 1950-1995 | Budapest, Hungary |
| Acta Geodaetica | 1966-2000 | Budapest, Hungary |
| Acta Geologica | 1952-2001 | Budapest, Hungary |
| Acta Historiae Artium | 1953-1998 | Budapest, Hungary |
| Acta Historiae Litterarum Hungaricarum | 1958-2006 | Szeged, Hungary |
| Acta Historica | 1951-1989 | Budapest, Hungary |
| Acta Hungarica | 1990-2014 | Uzhhorod, Ukraine |
| Acta Juridica | 1959-1996 | Budapest, Hungary |
