The latest editions of the journal are available online, through the main journal website, only to subscribers, AAAS members, and for delivery to IP addresses at institutions that subscribe; students, K–12 teachers, and some others can subscribe at a reduced fee. However, research articles published after 1997 are available for free (with online registration) one year after they are published i.e. delayed open access. Significant public-health related articles are also available for free, sometimes immediately after publication. AAAS members may also access the pre-1997 Science archives at the "Science" website, where it is called "Science Classic". Institutions can opt to add Science Classic to their subscriptions for an additional fee. Some older articles can also be accessed via JSTOR and ProQuest.