This manual is designed to facilitate the use of the Iowa Library Information Teletype Exchange (I-LITE) in participating libraries. It briefly describes I-LITE as a system designed to provide for a thorough search of the participating libraries' collections through the use of a public library wheel network and an academic wheel network. It then specifies regulations and operational techniques for library administrators and teletype exchange operators. They include: 1) the standard formats of messages; 2) reference regulations; 3) interlibrary loan regulations; 4) procedures for requests for various forms of library materials; and other necessary information for operation of the program. The manual also describes a few additional sources for desired materials, including the Resource Center at the Iowa State University Library, and the Bibliographical Center for Research. (CH)