Engineering achievements of the twentieth century

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1.
Electricity
2.
Automobile
3.
Airplane
4.
WaterSupplyDistribution
5.
ModernElectronics
6.
RadioandTelevision
7.
AgriculturalMechanization
8.
Computers
9.
Telephone
10.
AirConditioningandRefrigeration
11.
Highways
12.
Spacecrafts
13.
Internet
14.
ImagingTechnology
15.
HouseholdAppliances
16.
HealthTechnologies
17.
PetroleumandPetrochemicalTech
18.
LaserandFiberOptics
19.
NuclearTechnologies
20.
HighperformanceMaterials