Before assigning a String data type to a variable, we need to thoroughly understand Delphi's four string types. Short String Simply put, Short String is a counted array of (ANSII) characters, with up to 255 characters in the string.
In the early part of the 19th century, coal ovens were developed. Its shape was cylindrical and was made of heavy cast-iron. The gas oven saw its first use as early as the beginning of the 19th century as well. Gas stoves became very common household ovens once gas lines were available to most houses and neighborhoods. James Sharp patented one of the first gas stoves in 1826.
He had produced oxygen gas by heating mercuric oxide and various nitrates by about 1772. Scheele called the gas fire air because it was the only known supporter of combustion, and wrote an account of this discovery in a manuscript he titled Treatise on Air and Fire, which he sent to his publisher in 1775.