This paper examines the reasons for and the means of providing public library service to business and industry. It discusses the organization of a business and industry service, staff qualifications and training, and the composition of the collection. The importance of studies and surveys to determine the information and service needs of the economic community is stressed. Reference and other special services are described, as are ways of publicizing the service, including library publications and personal contacts between staff members and the public. Library cooperative agreements and user fees are suggested as ways to reduce and defray the costs of this expensive service. An appendix lists improvements in public libraries suggested by members of the economic community in a market analysis of business and industry information needs, as reported by Robert S. Meyer and Gerhard N. Rostvolt in "The Library and The Economic Community," published in 1969. A 17-item bibliography concludes the paper. (ESR)