In field names the narrower specialty an invention sits within inside its wider field. Wikipedia notes a telephone "converts sound... into electronic signals that are transmitted via cables and other communication channels," a specialty of electrical signal transmission inside telecommunications generally. This dimension groups inventions that share the same narrow technical specialty.
Facts
Comparison
Main Engineering Branch Field Founding Era In Field
Sources
1. Wikipedia: Engineering
WikipediaIntroduction, traditional disciplinesQuote, Introduction, traditional disciplines
The traditional disciplines of engineering are civil, mechanical, electrical, and chemical.
2. Wikipedia: Mechanical engineering
WikipediaIntroduction, Industrial Revolution emergenceQuote, Introduction, Industrial Revolution emergence
Mechanical engineering emerged as a field during the Industrial Revolution in Europe in the 18th century
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