industrial productivity. More people in the postindustrial world worked in service industries because
of increased mechanization of agriculture and industry.
Rapid Review
World Wars I and II saw a number of technological firsts, from improved transportation and
communications to more elaborate weaponry. The atomic bomb ushered in a nuclear age that was
among the focal points of the cold war era. Technology created new leisure time activities, improved
sanitation, and helped in the discoveries of new breakthroughs in medical science. The use of
technology to transmit information characterizes the twenty-first century.
Review Questions
1 . Postindustrial economies are characterized by a large number of people involved in
(A) manufacturing
(B) mining
(C) agriculture
(D) service industries
2 . Which of the following was NOT used first during World War I?
(A) Tanks
(B) Airplanes
(C) Radar
(D) Dirigibles
3 . The Helsinki Accords
(A) were a reaction against the insecurities of the nuclear age
(B) were a nuclear disarmament plan
(C) increased cold war rivalries
(D) called for a reduction in manned space flights
4 . Technology in the twentieth century accomplished all of the following EXCEPT
(A) unmanned space flights
(B) genetic engineering
(C) use of robotics
(D) invention of railroads
5 . Twentieth-century inventions and accomplishments
(A) did nothing to improve household chores
(B) popularized radio, especially in Europe
(C) saw continued U.S.-Soviet competition throughout the twentieth century
(D) were sometimes detrimental to the quality of life