……………were well known in the 1940s although they are now uncommon.

Related MCQs

• ………….differentiates between five stages of human development: In the first, people use energy of their own muscles.In the second, they use energy of domesticated animals’.In the third; they use the energy of plants (agricultural revolution). In the fourth, they learn to use theenergy of natural resources: coal, oil, gas. In the fifth, they harness nuclear energy.
• Originally, ……………..only existed in paper format, but now they are most likely created and maintained through a software program that displays the numerical information in rows and columns.
• The polished axes were used for forest clearance and the establishment of crop farming, and were effective as to remain in use when bronze and ………………..appeared.
• ………………., Blaise Pascal, and Gottfried Leibnitz were among mathematicians who designed and implemented calculators that were capable of addition, subtraction, multiplication, and division included.
• With Launching of a series of satellites by ……………….broadcasting (audio and video) and teleconferencing facilities are now available in almost every states and UTs of our country.
• In economics, definitions or assumptions of progress or growth are often related to one or more assumptions about technology's economic influence.Challenging prevailing assumptions about technology and its usefulness has led to alternative ideas like uneconomic growth or measuring well-being.These, and economics itself, can often be described as technologies, specifically, as…………………...
• A …………………enables users to share files and resources, such as printers, as well as send messages electronically (e-mail) to each other.
• Though the ………….. civilization had no metallurgy or wheel technology, they developed complex writing and astrological systems, and created sculptural works in stone and flint.
• In 2008 Stephen Turner and………………, both Cyber Classroom instructors, realized that they had a rare opportunity to make direct comparisons of student outcomes both without and with the Cyber Classroom recordings.
• The later Stone Age, during which the rudiments of agricultural technology were developed, is called…………………...