who invented refrigerator & what year was it invented
Refrigerator The history of artificial refrigeration began when Scottish professor William Cullen designed a small refrigerating machine in 1755. Cullen used a pump to create a partial vacuum over a container of diethyl ether, which then boiled, absorbing heat from the surrounding air.[3] The experiment even created a small amount of ice, but had no practical application at that time.
Charles Babbage Considered by some to be a "father of the computer",[2][3][4][5] Babbage is credited with inventing the first mechanical computer that eventually led to more complex electronic designs, though all the essential ideas of modern computers are to be found in Babbage's analytical engine.[2][6] His varied work in other fields has led him to be described as "pre-eminent" among the many polymaths of his century.[1]
ICD-10 Work on ICD-10 began in 1983 and was completed in 1992.[1]
Inauguration of John F. Kennedy And so, my fellow Americans: ask not what your country can do for youâ€”ask what you can do for your country.[35]