Ocado, one of the largest pure online grocers in the world, operates in two divisions. Ocado Retail is the group's online grocery business in the United Kingdom, a joint venture with Marks & Spencer; it offers an extensive product range of over 55,000 items via its Ocado.com website and holds more than 15% of the U.K. online grocery market and approximately 2% of the total U.K. grocery market. Ocado Solutions is built on the Ocado Smart Platform, a modular, automated online retail fulfillment and delivery solution that involves the provision of software, fulfillment infrastructure, and support services to corporate clients for a variety of one-time and ongoing costs. OSP has allowed the company to work with some of the world's largest grocers, including Ocado's retail operation.