Tagged “reference”
285 pages · most loved first · page 1 of 12
Encyclopaedia Britannica
The online edition of the venerable general encyclopedia, with fact-checked articles across history, science, and cultur…
507 Mechanical Movements
A table of contents for the classic collection of 507 mechanical movements, each illustrated with an animation of gears,…
555 Timer Circuits
A hobbyist reference to the classic 555 timer chip, with lessons on how it works and more than 80 buildable circuits lik…
88-108 MHz
A hobbyist reference to FM broadcast antennas, listing models from Antennacraft, Channel Master, Finco and more with per…
A look at search engines with their own indexes
A thorough survey of independent search engines that crawl their own indexes, comparing quirks and strengths, handy for…
A Periodic Table of Visualization Methods
An interactive periodic table of data, information, concept and strategy visualization methods; hover any element to see…
Abbreviations.com
A large reference for looking up acronyms and abbreviations, with meanings and categories spanning tech, medicine, busin…
About World Languages
An overview site profiling the history, grammar, and speaker distribution of dozens of the world's major and minor langu…
Access Guide
A friendly introduction to digital accessibility based on WCAG 2.1, explaining each guideline in plain language with pra…
Adjectives: order - Cambridge Grammar
A clear reference lesson on the order English adjectives follow, with examples that explain why a lovely old wooden hous…
Algebra Rules
A reference of the basic rules of algebra, each with a plain explanation and worked examples, covering arithmetic, expon…
American Translators Association
The professional body for translators and interpreters in the US, offering public resources on the craft and business of…
AmphibiaWeb
A scientific database cataloguing every known amphibian species with distribution maps, conservation status, and identif…
AmpWhat
A fast lookup for Unicode and HTML symbols, entities, and characters, with hex and decimal codes for punctuation, math s…
Angiosperm Phylogeny Website
A comprehensive, highly technical reference on the evolutionary relationships among flowering plants, with detailed page…
Animated Knots by Grog
A knot-tying reference with step-by-step animations for the basic knots and many more, laid out so each tie is easy to f…
Anime Filler List
A reference that tags every episode of long-running anime series as canon, mixed canon, or filler, so you can skip the p…
Arbitrary LaTeX Reference
A hand-written reference of LaTeX notes and examples covering the tricks and gotchas that come up in papers, reports, an…
Aristotl
A quick lookup tool for logical fallacies, so you can search or browse named reasoning errors and spot ad hominem, straw…
Art History Teaching Resources
A peer-populated collection of resources for art history teachers, with lesson plans, images, readings and teaching idea…
Artcyclopedia
An index of online museums and image archives that shows where the works of over 8,000 fine artists can be viewed on the…
Art-Res
A hand-curated collection of free art resources and tutorials for learning to draw and paint, plus an idea generator and…
Asciify
A fast ASCII and Unicode reference where you search characters, toggle between standard and extended sets, and copy hex…
Atomic Rockets
A sprawling reference on realistic spaceship design for science fiction writers, covering orbital mechanics, nuclear pro…
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