Product, service, and resource categories are listed alphabetically, as are the companies that offer them. The companies that supply each listed product, service, or resource are listed under each category. A supplier can be located in the alphabetical listing of companies; the user can then check the product, service, or resources category under which each company is listed. Each company's name, address, telephone and fax numbers, web site, and e-mail addresses are provided, along with a brief description of its products, services, and resources.