With RGIS Inventory Specialists, you can count on a lot of counting. Along with Washington Inventory Service, the company is one of the leading third-party inventory takers in the US. RGIS employees count inventory for their customers, primarily large retailers but also manufacturers. Employees use scanners that send information to a computer system at RGIS headquarters. The company operates from offices throughout the US, Canada, and Mexico, as well as in Europe and South America. RGIS, which stands for "Retail Grocery Inventory Service," was founded in 1958 by Thomas Nicholson, whose descendants still own the company.