The library at Mt. San Antonio College has experimented with the use of machines in teaching library usage to patrons. Five Videosonic machines were programed to teach general information on the library and to give instruction in the use of periodical indexes and of card catalogs. Controlled study indicated that students who utilized the machines used the library more efficiently and sought services from staff members less frequently than students who did not utilize them. Despite several

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... ical limitations, increased use of teaching machines for this purpose is indicated.