eGVybw%3D%3D - zipp
- rigid dirigible airship
- Robert A Moog
- Robert Fulton
- Robert Goddard, Herman Oberth, Konstantin Tsiolkovsky
- Robert Noyce and Jack Kilby
- Robert Whitehead
- Robert Wilhelm von Bunsen
- Rolfing
- rotary printing
- Rudolf Diesel
- safety elevator
- safety pin
- safety razor
- Samuel B Morse
- Samuel Colt
- Samuel F B Morse
- Samuel Hahnemann
- Samuel van Syckel
- Schuyler Wheeler
- science fiction
- science of flight
- Scoville Test
- Scrabble (board game)
- Scrabble (board game)
- screw propeller
- self-propelled torpedo
- self-starter
- semaphore telegraph
- sewing machine
- sextant
- Seymour Cray
- shopping cart
- Sir Frank Whittle
- Sir George Cayley
- Sir William Crookes
- soft-touch manipulation combined with exercises to release tension, developed by Milton Trager
- spectroscope
- spinning frame
- spinning jenny
- stainless steel
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