Pickles are foods preserved by pickling in a liquid such as vinegar or brine, usually containing spices to enhance flavor. They can be made from vegetables, fruits, meat, eggs, or nuts, and popular examples include sauerkraut, cucumber pickles, and chutneys. In food processing, pickling preserves through acidity, salt, or lactic fermentation, each creating conditions hostile to spoilage organisms and pathogens. Process control focuses on achieving safe pH and salt levels, proper heat treatment where applied, and hygienic packaging. Pickles contribute distinctive tangy flavors and extended shelf life to diets worldwide, and their manufacture ranges from artisanal batches to large-scale industrial lines with standardized quality specifications.