Founded by Charles R. Walgreens, Walgreens is a large American retailing chain for drugs. It is headquartered in where it is founded Chicago, Illinois. Serving from 1901, Walgreens started its business with health, beauty, vision and pharmacy drugs, and now it runs over 8000 stores national wide for 17 categories products and owns the products of its brand. Walgreens not only serve and offers dugs for people with competitive prices but also has its own food plants after 1910 and it is the creator of the pop malted milkshake. Now, Walgreens has involved in local groceries and the most famous American drugstore.