This report describes the results of a project to conduct research on and to develop instructional materials for use in on-the-job training of professional and non-professional library personnel in scientific and technical libraries. The project began on June 28, 1967 and was completed on May 15, 1969. This report reviews previous research, design, and development activities but concentrates on the effort following October 31, 1968, which involved field testing the developed instruction, analyzing the test results, and making final modifications to the packages before turning them over to the U.S. Office of Education. Three instructional packages were developed. One, directed to professional librarians, provided an introduction to system analysis, with particular emphasis on its relevance to library operations. The other two instructional packages, designed for non-professional library personnel, consist of workshop materials on reference tools and services and Russian-to-English transliteration. Each of the three packages was tested in the field in libraries of different sizes and with junior-college students. It is concluded that the developed instruction meets its design objectives and provides effective means to enhancing skills in the three areas concerned. (Author/CC)