JSTOR contains fulltext academic journals in the Humanities, Social Sciences, and Sciences. JSTOR provides complete journal backruns from the date of initial publication up to a date defined, on a publisher by publisher basis, by a "moving wall". The moving wall is a fixed period of time ranging, in most cases, from 2 to 5 years, that defines the gap between the most recently published issue and the date of the most recent issues available in JSTOR.