Method and system for storing prospect lists in a computer database

A method of storing a prospect list, the method comprising:

• providing a server computer hosting a prospect list service accessible via client computers to a plurality of prospect list managers and a plurality of list purchasers;
• providing a database of information concerning prospect lists available from a plurality of list managers;
• providing a prospect list service including a user interface comprising controls whereby at least one of a list manager and a list purchaser can access information concerning prospect lists stored in the database, the prospect list service being available via a computer network to assist a list manager in offering a prospect list for sale to a plurality of list purchasers and to assist a list purchaser in selecting and purchasing a list of prospects from a list manager;
• receiving a prospect list for storage in the database, the prospect list including one or more attributes for characterizing the prospective customers on the list, each prospective customer on the list having attribute data for one or more of the attributes included in the prospect list;
• assigning an unique attribute ID to each attribute associated with the prospect list;
• and
• storing each attribute and associated attribute data in the database.