Preliminary research conducted on undergraduate university students showed that those tested average only 32 percent correct on their pretest knowledge of the workings of the library card catalog. This card catalog program text has been designed to help the student learn the use of the card catalog and to use it faster and more effectively. The program deals with six aspects of the card catalog: (1) filing rules; (2) call numbers; (3) cross-referencing; (4) author, title, and subject cards; (5) tracings and (6) the book Subject Heading Used in the Dictionary Catalogs of the Library of Congress. Three main divisions of the material are: (1) pretest, (2) workbook, and (3) posttest. The tests are designed to be self-administered and self-scored. The student should take the pretest and grade it himself; it will show in which of the six areas of the card catalog he needs instructional help. The student then should follow the instruction outlined in each of the critical areas as indicated by the pretest results. The student should spend as much or as little time in instruction as is felt necessary before taking the posttest. Compare pretest and posttest scores for actual learning gain. (Author/SJ)