Quaker Oats is a brand of cereal that has been around since the late 19th century. It is known for its iconic Quaker man logo and its range of breakfast cereals, including Oatmeal Squares, LIFE, and Oat Bran. The term 'Quaker Cereal' refers to any of these products. OHS stands for 'Old-Fashioned Oats', which is a type of Quaker Cereal made with whole oats. LIFE is a type of Quaker Cereal made with whole grain oats, wheat, and barley.