Technology
as it shaped history
and was shaped by events,
may be thought of as an existing set of conditions requiring contingency plans.
- Conditions characterized by tool complexes of related inventions to fit specific conditions of places.
- Material artifacts and devices that contribute solutions to the existing conditions to alter their arrangements.
- The associated ideas that enable the techniques employing tools to function effectively among a society of users.
periods | perceptual psychology | redefining terms | water wheels | conclusion
Chinese waterwheels --undershot, a reproduction of 11th century designs.
According to Gestalt Psychologists, people perceive the world, especially the technologically altered world in layers. These three overlapping layers are the umwelt, eigenwelt and the mitwelt, or within our experience of the world there are three worlds.

Conclusions:
Technological change has reorganized our ideas of space, time and appropriate behavior, offering humankind a great choice to either adapt and learn, or remain powerless and enslaved by our self-satisfied ignorance of nature, history and one another's needs.
In German gestalt psychology, which deals with how we perceive whole or related experiences, theorists suggest there are three worlds in which we reside:
Technology alters all of these worlds:
Eigenwelt is the personal world of our experiences. Mitwelt is the social world in which we participate with others. Umwelt is the universe, the cosmos, the earth to which we are tied.periods | perceptual psychology | redefining terms | water wheels | conclusion
Five eras of technical inventions with the powers to reorganize our world, historically:
Technological changes have been used to divide our past into periods.
| Periods | approximate start | dominant tool complexes | |
| I | Stone Age | 10,000 BC | hand ax, edible plants,domestic cattle, pigs, fire, bone |
| II | Bronze Age | 5000 BC | copper smelting, wood fuel, forges, horses |
| III | Iron Age | 1000 BC | charcoal fuels, olive oil, rice wine, hot metal forges |
| IV | Mechanical Age | 1543 | clocks, textiles, steam engines, coal & coke fuels |
| V | Information Age | 1953 | electricity, radio, telecommunications, satellites |
periods | perceptual psychology | redefining terms | water wheels | conclusion
Technology is a material manifestation of dominant ideas, practices and institutions with varied means and powers to solve problems that serve a human purpose.
Technology influences our characterization of appropriate gender roles.
Laws of Technology reveal the power of certain tools and discoveries to alter the measure of our surrounding world, experience and values: sundials, clocks, watches, computers.
Technolgy in the contemporary world, based on a mechanistic view of reality where machines alter our behavior "aims to remake nature and compel us to live entirely in a technical milieu."
For example: automobiles, telecommunications, film, automatic rifles.
periods | perceptual psychology | redefining terms | water wheels | conclusion
"We are what we use."
Three realms of technology or aspects of technical power
Pacey on Meaning | Pursell | Technology defined | Dimensions of Technology
A tcchnique of discovery | Photographs, impact of
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| Tools of Toil: what to read. | ||
| Tools are historical building blocks of technology. | ||
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