A. Telegraph
B. Radio
C. Television
D. Dishwasher
A. Abraham Lincoln
B. Theodore Roosevelt
C. Thomas Jefferson
D. Rutherford B. Hayes
A. Light bulb
B. Electric razor
C. Refrigerator
D. Railway air brakes
A. Robert Koch
B. Edward Jenner
C. Robert Hooke
D. Louis Pasteur
A. Electric Drill
B. Electric Shaver
C. Electric Fence
D. Electric Heater
A. X ray machine
B. Betatron
C. Cyclotron
D. Nuclear reactor
A. Visa
B. Discover
C. MasterCharge
D. Diner's Club
A. 1743
B. 1739
C. 1760
D. 1785
A. Lewis Edson Waterman
B. Sir William Grove
C. Charles Kettering
D. George Fountain
A. Thornton Hargreaves
B. Peter Hargreaves
C. James Hargreaves
D. Simon Hargreaves