-
4000 BCE
Sailboat
-
3000 BCE
Lever
-
3000 BCE
Abacus
-
2000 BCE
Nail
-
1000 BCE
Cement
-
99
Clock
-
199
Paper
-
299
Archimedes Screw
-
999
Gunpowder
-
1099
Paper Money
-
1199
Compass
-
1299
Optical Lenses
-
1430
Printing Press