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The IAPSOP is a US-based private organization focused on the digital preservation of Spiritualist and occult periodicals published between the Congress of Vienna and the start of the Second World War. Our all-volunteer staff digitizes, indexes and makes available free-of-charge these periodicals, in our archive, for use by students and researchers. We have a standing want list and will respond promptly to inquiries and offers from sellers. We accept contributions of material and labor to further this work. If you want a complete local copy of IAPSOP's holdings, follow these instructions. If you know what you're looking for, hit the archive index directly. If you want to explore a particular area of the occult, start with the lists below, prepared by IAPSOP's directors. If you are interested in practical teachings, browse our Lessons archive. If you have a request, need help, are experiencing a technical problem or outage, or want to report a problem with any of our holdings, contact IAPSOP Customer Support.
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| SERVICE RESTRICTION |
| The main IAPSOP server is being overrun by unknown crawlers running on IP addresses controlled by Amazon Web Services (AWS), mysterious Chinese sites, and other organizations, all of which are almost collecting materials to train large language models (LLMs) -- so-called "artificial intelligence." To ensure equitable access, the speed of any one connection to the IAPSOP archive is currently throttled, and the total bandwidth available is also limited. Service will be restored to normal when the pigs leave the trough... which is likely never. Free "AI" costs IAPSOP, and many other organizations, quite a bit.
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| Current Holdings: | 4.13 million pages (2.17M pages of monographs, 1.95M pages of periodicals), +48,000 files, +730 gigabytes of data |
| Latest Milestones: | Q12023 Refresh: Significant updates and additions to German and French occult periodicals |
| Top 20 Publications (Prior 90 Days) |
Banner of Light Lessons of the Mayan Order Whisper Light Lucifer Occult Review Annales du Magnetisme Animal Ostara Psychic Science The Two Worlds Leaves of Healing Lessons of the Order of the Essenes The Theosophist The Gallery of Spirit Art Modern Mystic Luce e Ombra Spiritual Magazine (UK) Spiritualist (UK) Theosophic Messenger Biibliotheque du Magnetisme Animal
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| Top 20 Visiting Countries (of 82 total, Prior 90 Days) | US UK Canada France Brazil Germany India Italy Australia Netherlands Spain Ireland Russia Poland China Sweden Mexico Switzerland Czech Republic Hungary |
| 5 Least-Frequently Visiting Countries (of 82 total, Prior 90 Days) | Togo Ukraine Slovakia Singapore Saudi Arabia |
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