Many organizations have used WebGUI to set up powerful extranet frameworks to effectively communicate with clients and outside business users. Portal systems that contain instances of single sign-on logic allow for the integration of many disparate systems to grant access to various types of business information from a single source. Complex privilege systems grant users access to only the areas of an extranet that apply specifically to them, creating a secure environment that is at the same time user-friendly by eliminating confusing or non-applicable information. Sales employees can travel across the country and enter their sales data in an efficient, yet secure, system from wherever they are. In addition, complex systems that connect marketing, sales, and promotional centers facilitate the business process by allowing users from all industry areas to collaborate over a common interface.