Tesco has 4811 stores worlwide with a staff of over 472,000 and Sales area of 94m Sq ft and a pre-tax profits of ??3.4bn for the 12 months to the end of February 2010 a 10.1% rise on the previous year. ?? Its principal activity?? is food retailing, but it has expanded into different formats / markets including clothing, financial services, music download and electronics.