A harvester is a substantial agricultural machine with the sole purpose of quickly cutting and collecting crops such as wheat, rice, and maize. Harvesters allow the operations of reaping, threshing, and winnowing to be done simultaneously, saving time and labor. Harvesters come in various sizes, from small for smaller farms, to large commercial harvesters. Harvesters are used to increase productivity and reduce manual labor. Farmers use harvesters to get done harvesting quickly with little to no crop loss. Harvesters are essential tools of modern farming.