Education
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Rulers
A reference database of heads of state and government for countries and territories around the world, past and present,…
Rum Wonk
A deep-dive rum newsletter by Matt Pietrek with history, myth-busting, and advanced analysis that goes well beyond ordin…
Runestone Academy
A free library of interactive online textbooks for computer science and math, with runnable code, quizzes, and visualiza…
RunJS Playground
An online JavaScript playground that runs your code instantly with live feedback, handy for learning the language and pr…
Running Reality
An interactive world map you can scrub through 5,500 years of history, watching borders, cities, and empires shift year…
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…
Russian Pantheon
An interactive 3D tour of the Millennium of Russia monument in Veliky Novgorod, where you click each of its bronze figur…
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…
SadServers
A collection of Linux troubleshooting scenarios where you get a broken server and must debug it, like LeetCode for sysad…
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…
Samuel L. Clemens to Orion Clemens, 1874
Mark Twain's 1874 letter to his brother written on his newly bought typewriter, typos and all, presented with notes and…
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…
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