Education
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Runestone Academy
A free library of interactive online textbooks for computer science and math, with runnable code, quizzes, and visualiza…
Rural Outside Plant
A photo tour of how telephone lines reach rural homes, with captioned images of cables, poles, pedestals and equipment f…
russiandinosaur.blogspot.com
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Russian Dinosaur
A blog about Russian literature and translation issues, presented by a small stuffed dinosaur, with essays on poets, cri…
Russian Lessons.Net
A free site offering structured Russian grammar lessons, vocabulary lists, and alphabet guides for learners at every lev…
Ruth Asawa
The Ruth Asawa site explores the artist's looped-wire sculptures, works on paper and public fountains, with sections on…
RuVerses
An online library of Russian poetry in English translation, collecting verses from classic and modern poets for readers…
SABR
The Society for American Baseball Research publishes member-written biographies of thousands of players and deep researc…
Safal Niveshak
A blog on value investing, personal finance, and behavioral finance for everyday investors, with essays on temperament,…
Sailboat Physics and Design
A hobbyist's illustrated explainers on how aerofoils, sails, keels and fins generate lift and how a yacht works, from ci…
Sailing Britican
A sailing site of guides, checklists and how-tos covering learning to sail, choosing and financing a sailboat, and first…
Saint Helena Island Info
A detailed guide to remote St Helena in the South Atlantic, covering history, wildlife, communications and daily life on…
Salieri
Personal essays and philosophy papers by a product builder, from close readings of Disco Elysium and Expedition 33 to pi…
Sally's Baking Addiction
A trusted baking resource by Sally McKenney offering thoroughly tested dessert recipes, troubleshooting tips, and step-b…
Salman Ansari
Essays on creativity, self-awareness, and playful productivity from Salman Ansari, a founder, engineer, writer, and arti…
Sam's Laser FAQ
A practical guide to lasers for experimenters and hobbyists, covering safety, types, parts, drive electronics and constr…
Samurai Archives
A long-running reference site and forum dedicated to Japanese history, especially the samurai class and feudal Japan.
samwho.dev
Sam Rose's interactive visual essays explaining systems concepts like load balancing, queueing, memory allocation, and B…
Sanskrit Dictionary
A free searchable Sanskrit-English dictionary and grammar tool covering both classical and Vedic vocabulary for students…
Saqqara
Egypt's official monuments guide to Saqqara, the vast necropolis of Memphis, covering the Step Pyramid of Djoser, mastab…
Sarcophagus of the Crying Women
A Museum With No Frontiers virtual museum entry on the Sarcophagus of the Crying Women from Sidon, with photos and conte…
SATArchive
A free archive of past SAT, SAT Subject Test, and PSAT/NMSQT papers and study resources, collected in one place for stud…
Saul Steinberg Foundation
Explore the life and witty drawings of Saul Steinberg, the New Yorker artist, through selected artworks, a detailed chro…
Save the Pacific Northwest Tree Octopus
A classic internet hoax site earnestly campaigning to save the endangered Pacific Northwest tree octopus, with sightings…
Saving Slave Houses
A preservation and documentation project recording surviving slave dwellings across the American South, with a slave hou…
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