This continuously expanding collection contains eleven major collections including hard copy interview transcripts, sound recordings on mini DV, beta cassettes, approximately 20 linear meters of materials and 0.8 TB of digital surrogates.

In 2009 the Institute of Sociology of the Hungarian Academy of Sciences brought to life The 20th Century Voices Research Group to curate the documentary heritage of Hungarian sociology. The group’s mission is to identify endangered research documentation (sound recordings, tapes, transcribed interviews, movies, etc.) in the possession of individual researchers or research institutes in order to preserve them as an archival collection. Since 2009 the members of the research group have been negotiating with a number of collectors and creators.

The collection is organized according to research projects named after the principal investigator or the subject of the research. These projects constitute the subfonds structure, and within each subfonds, we have several series on more specific sub-topics. The collection includes qualitative research documentation, and structured interviews starting from the 1970s. The unedited "raw data" provide valuable insight into the everyday life of the Communist regime in Hungary. The physical materials can be explored in the Research Room, while digital copies are available in the digital repository http://voices.osaarchivum.org/ .

In the course of processing, duplicates have been removed.

Both hard copy and digital records are open for research.