A broader term than descriptor or subject heading . A keyword might be found in various parts of the record including the descriptor , subject heading , title , or abstract . Magazine - a type of periodical especially one that is intended for a general reading audience and contains articles of popular interest. Compare with journal . Online - a general term for when one computer is interacting directly and simultaneously with another computer.
Many sources of information are available online.
Compare with CD-ROM . Periodical - a publication issued at regular intervals with no predetermined termination of publication. The term periodical includes magazines , journals , and newspapers. Record - the information, including the citation and descriptors , that describes a book, article or other item. Some records include an abstract .