Become a Friend of the SEP and Access PDFs

You can support the Stanford Encyclopedia of Philosophy byjoining theFriends of the SEP Society. By paying modest, annual membership dues to join theSociety,members will receive the following benefits: (a) download access tohigh quality PDF (Portable Document Format, a.k.a. Acrobat) versionsof SEP entries and (b) quarterly email notifications (if you‘opt-in’) that inform you when PDFs you've downloaded havebeen updated in the most recent quarterly SEP Archive.

Go to theFriends of the SEP Society Home Page
The home page for the Society is located athttps://leibniz.stanford.edu/friends/.

Sample PDFs

Paper Size: US Letter (8½ × 11 in)		Paper Size: A4 (210 × 297 mm)
Sample PDF Entry on Turing Machines		Sample PDF Entry on Turing Machines

We also release our PDFs insingle-column half-sheets (5½ × 8½ in)—see theSample PDF. You might find this format especially useful for mobile devices.

Membership Levels

You canjoin the Friends of the SEP Society,using our secure online payment system, at one of the following levels:

• Associate Member: Associate members may download any of the PDF versions in the PDF Library but are limited to downloading a maximum of 5 different entries per day.
• Student Member: Student members have the same privileges as Associate Members, but annual membership dues are priced lower.
• Professional Member: Professional members may download any of the PDF versions in the PDF Library, withnodaily limits on the number of different entries that can be downloaded each day.

For pricing information, see the section on Membership Levels at the pageAbout the Society.