Discusses the evolution of standards for bar codes (series of printed lines and spaces that represent numbers, symbols, and/or letters of alphabet) and describes the two types most frequently adopted by libraries--Code-A-Bar and CODE 39. Format of the codes is illustrated. Six references and definitions of terminology are appended. (EJS)

Seven articles discuss aspects of transaction log analysis, including introduction and definitions; history and development; components of an ideal logging facility; research methodologies; applications to a variety of library functions; practical and logical limits of the methodology; and future developments needed to enhance successful use of…