An electronic collection of the complete back runs of about 246 scholarly journals. Coverage for each journal title begins whenever the journal started, with several titles going back to the nineteenth century, with coverage up to 1 year ago, depending on the journal.
A cautionary note: JSTOR is an archival resource; no journals are included full-text up to the present. Each journal has a "moving wall" of 1 to 5 years (depending on the journal). So, coverage of some journals will stop a year ago, others will stop 2 years ago, etc. Each January, another year's content is added.