This document is the final report of the NCLIS (National Commission on Libraries and Information Science) study on public libraries and the Internet. The purpose of this study was to determine the nature, extent, and form of public library involvement with the Internet. Data were obtained from a survey of a national sample of public libraries between January and March 1994. Questionnaires were sent to 1,495 public libraries, and a total of 1,148 surveys were returned for a response rate of 76.8%. The study gathered data on a variety of Internet-related topics, including the degree to which public libraries have operational connections to the Internet; type of provider that the public library uses to obtain connectivity; Internet services and resources that public librarians use; public library programs or services that have been developed to incorporate Internet use; factors affecting public library use of the Internet; and estimated expenditures and costs public libraries incur for connectivity to and using the Internet. The report is divided into four parts: an introduction to the study; the study results including methodology; the policy debate; and the key issues and recommendations of the study. The survey instrument is appended. (Contains 32 references.) (JLB)