LEO DEAN JANSEN, MD
TECHNOLOGY: TABLE, TRUTHS, TIMELINE, TOP 100 & photography
Periodic Table of Technology
All of technology history organized into a single table. 1000 Greatest Inventions listed by technology class and time era.
Laws of Technology
Laws of technology spelled out as 24 truths.
Chronology of Inventions
2000 inventions arranged chronologically. Invention, date, inventor, and country of origin listed.
Capturing Moments of Beauty
Photographs organized by landscape, wildlife, macro/portrait, and urban.