Whisky is a distilled alcoholic beverage made from fermented grain mash. Various grains (which may be malted) are used for different varieties, including barley, corn (maize), rye, and wheat. Whisky is typically aged in wooden casks, generally made of charred white oak.
Scotch whisky is distilled from barley. The unique flavours and tastes of the whisky are obtained depending on where the whisky was distilled. Many factors contribute to the finished product. These include the distillery location e.g. Speyside distilleries produce whisky which is noted for sweetness whereas west coast distilleries are noted for their peated nature. Other factors which are taken into account are the water used, type of cask and length of maturation.
Whisky is a strictly regulated spirit worldwide with many classes and types. The typical unifying characteristics of the different classes and types are the fermentation of grains, distillation, and aging in wooden barrels.