摘要：Although many medical libraries use general classification schemes, the specific requirements of their field have always made them more inclined towards special classification schemes. This paper outlines the most commonly used special classification systems for medical libraries in the United States, United Kingdom and Republic of Ireland. Also, the most frequently encountered problems that make the classification of medical material exceptionally complex are listed. To overcome the shortcomings of classification schemes, a medical library must have a subject catalogue, i.e., an extensive thesaurus of subject headings.
关键词：medical libraries; classification schemes; classification of medical literature
