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: Electrical engineering
WikipediaIntroduction, emergence as an occupationQuote, Introduction, emergence as an occupation
It emerged as an identifiable occupation in the latter half of the 19th century after the commercialization of the electric telegraph.
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