Electronic commerce services via a global computer information network, namely, providing business procurement and purchase management services in the nature of on-line or electronic vendor selection, specification-writing, distribution of solicitations or proposals, approving, ordering, auctioning, bidding, purchasing, and/or invoicing of customized goods or services relating to printing, packaging, labeling, manufacturing of digitally-mastered goods, and other information products, featuring user-customized purchasing preferences, procedures, and monitoring and reporting for clients