A combine harvester is a large agricultural machine designed to efficiently harvest crops. It combines three main functions: reaping, threshing, and winnowing. This allows farmers to gather and process crops like wheat, corn, and soybeans in a single operation, saving time and labor. The machine typically features a cutting header at the front, which cuts the crop, while the internal mechanisms separate the grain from the chaff. Modern combine harvesters are often equipped with advanced technology, including GPS and automated controls, enhancing their efficiency and precision in the field.