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)

Presents results of survey of procedures to handle the circulation of unbound periodicals in 232 public and academic libraries using four major turnkey automated circulation systems. Methods used are described (use of machine-readable symbol attached to issue) and procedures developed at the Eastern Washington University Library are explained in…