-
4000 BCE
The sailboat
-
3400 BCE
The nail
-
1500 BCE
Alphabetization
-
400 BCE
The abacus
-
260 BCE
The lever
-
250 BCE
Archimedes’ screw
-
105
Paper
-
618
Paper money
-
900
Gunpowder
-
1100
The compass
-
1248
Optical lenses
-
1300
The mechanized clock
-
1436
The Printing Press
-
1582
The Gregorian calendar
-
The steam engine
-
The sextant
-
Machine clock
-
The cotton gin
-
Vaccination
-
Scientific plant breeding
-
Cement
-
Photography
-
The combine harvester
-
The telegraph
-
The moldboard plow
-
Anesthesia
-
Refrigeration
-
Sanitation systems
-
Industrial steelmaking
-
Oil refining
-
Oil drilling
-
The internal combustion engine
-
Pasteurization
-
The telephone
-
Electric light bulb
-
The steam turbine
-
The automobile
-
Radio
-
Air-conditioning
-
The airplane
-
The assembly line
-
Nitrogen fixation
-
Rocketry
-
Television
-
Penicillin
-
Nuclear fission
-
Semiconductor transistor
-
The pill
-
The Internet
-
The green revolution
-
The personal computer
