Three native writing systems developed in Iberia.
Depending on the language, such sound-based systems developed in two directions.
Newer systems developed in Europe and the former Soviet Union are cheaper to operate; some use only one-fifth as much electricity.
That technology uses far more electricity than newer systems developed in Europe and the former Soviet Union, which are now commercial competitors.
In the 1990's, when Mr. Wertheimer first researched fare searches, many airlines and travel agents still used systems developed in the 1950's.
A proponent of the so-called hygiene theory, Rook believes that at an earlier, less sanitary period of human evolution, our immune systems developed in relationship with the microbes in dirt.
They have infuriated many Europeans who seem to have little trouble believing that military espionage systems developed in the cold war would now be used to help businesses in English-speaking nations.
Scientists say they have learned a tremendous amount about the Red River since its last major flood in 1997, using sophisticated modeling systems developed in the wake of disasters up and down the river that year.
As the French and English colonial systems developed in the 17th century, the Abenaki became involved in the fur trade, exchanging beaver and other pelts for imported goods such as metal tools and glass beads.
The projects were related to real systems developed in companies where the students work.
