Subcategories - Inventors
- James Watt Develops His Steam Engine
- Jean-Baptiste Vacquette de Gribeauval
- Jethro Tull
- Johann Gutenberg
- John Baskerville
- John Fitch
- John Kay
- John Philip Holland
- John Roebuck
- John Wilkinson
- Johnson Perfects the Process to Mass-Produce Disc Recordings
- Joseph Wilson Swan
- Kodak Perfects Color Film for Infrared Photography
- Land Demonstrates the Polaroid Camera
- Land Invents a Camera/Film System That Develops Instant Pictures
- Larson Constructs the First Modern Polygraph
- Lawrence Develops the Cyclotron
- Lee de Forest
- Leonardo da Vinci
- Louis and Auguste Lumière Develop Color Photography
- Louis Braille
- Lyons Constructs First Atomic Clock
- Madam C. J. Walker
- Man Ray Creates the Rayograph
- Marconi Patents the Telegraph
- Marconi Receives the First Transatlantic Telegraphic Radio Transmission
- Matthew Boulton
- McCormick Invents the Reaper
- Michael Faraday
- The Microprocessor “Computer on a Chip” Is Introduced
- Müller Invents the Field Emission Microscope
- Murray and Szostak Create the First Artificial Chromosome
- Nicolas Leblanc
- Nikola Tesla
- Nikolaus August Otto
- Ottmar Mergenthaler
- Otto von Guericke
- Plunkett Synthesizes Teflon
- Polystyrene Is Marketed
- Pyotr Leonidovich Kapitsa
- R. Buckminster Fuller
- RCA Begins Electronic Television Broadcasts
- Reber Makes the First Radio Maps of the Universe
- Ricardo Designs Modern Internal Combustion Engine
- Richard Arkwright
- Richter Develops a Scale for Measuring Earthquake Strength
- Rohrer and Binnig Invent the Scanning Tunneling Microscope
- Rudolf Diesel
- Salomon Develops Mammography
- Samuel Colt
