The cumulative dataset harmonizes and integrates selected long trends on public understanding of science derived from 5 Eurobarometer surveys: Eurobarometer 31, March-April 1989; Eurobarometer 38.1, November 1992; Eurobarometer 55.2, May-June 2001; Candidate Countries EB 2002.3, October-November 2002; and Eurobarometer 63.1, January-February 2005. The study includes 97 variables, including trends on knowledge about, engagement with and attitudes towards science and technology plus relevant demographics. The cumultive file can be ordered through GESIS.