He participated in the development of the electrical telegraph, and he did some good modeling work that improved the foundations of the field, notably creating the telegrapher's equations.
He was one of those idealists who just want to do some cool work even if they have to starve for it, people had to get a state pension for him for his contributions. Nice guy. en.wikipedia.org/w/index.php?title=Oliver_Heaviside&oldid=1230097796#Later_years_and_views:He also never married: www.nndb.com/people/627/000204015/
In 1896, FitzGerald and John Perry obtained a civil list pension of £120 per year for Heaviside, who was now living in Devon, and persuaded him to accept it, after he had rejected other charitable offers from the Royal Society.
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Oliver Heaviside (1850–1925) was a prominent English engineer, mathematician, and physicist known primarily for his work in electrical engineering and his contributions to the field of electromagnetic theory. He is best remembered for reformulating James Clerk Maxwell's original equations of electromagnetism into a more practical form that is used today, which is often referred to as the Heaviside form of Maxwell's equations.