Origin era places a technology field in the period when it first became a recognized profession. Wikipedia notes electrical engineering "emerged as an identifiable occupation in the latter half of the 19th century after the commercialization of the electric telegraph, the telephone, and electrical power generation." Browsing by origin era shows how long a technology field has actually existed as its own discipline.
Facts
Comparison
Main Engineering Branch Field Founding Era Origin Era
Sources
1. Wikipedia: Engineering
WikipediaIntroduction, traditional disciplinesQuote, Introduction, traditional disciplines
The traditional disciplines of engineering are civil, mechanical, electrical, and chemical.
2. Wikipedia: Chemical engineering
WikipediaHistory, term origin, circa 1890Quote, History, term origin, circa 1890
History of Science in United States: An Encyclopedia puts the use of the term around 1890.
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