Intended for teaching applications programing for libraries and information centers, this volume is a graded workbook or text supplement containing typical practice problems, suggested solutions, and brief analyses which emphasize programing efficiency. The computer language used is Programing Language/One (PL/1) because it adapts readily to library problems. The book is divided into two parts, the first covering introductory applications such as: control cards, DECLARE statements, program documentation, compilation vs. execution, input and output, builtin functions, PL/1 logical operators, simple search, number and cost of acquisitions, and circulation tally. The second part includes the more advanced applications related to: selective dissemination of information, simple sorting, keyword indexing, binary search, weighted-term searching, on-line interactive programing, and elements of auxiliary storage. There are copious illustrations of cards, printouts, and flow charts as well as a selected bibliography and index. (Author/LS)