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: Aerospace engineering
WikipediaHistory, 1958 first definitionQuote, History, 1958 first definition
The first definition of aerospace engineering appeared in February 1958, considering the Earth's atmosphere and outer space as a single realm.
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