- Serials. Periodicals W 1
- Serial documents (Table G) W 2
(Classify here government administrative reports and statistics, including administrative reports and statistics on several hospitals under governmental administration. )
(Hospital administrative reports and statistics
See: WX 2; )
- Congresses W 3
(Classify here monographic and serial publication of recurring congresses on medicine and related subjects. Note that as of July 1, 1988, NLM no longer assigns W3 to newly acquired publications, with the exception of analytics to ongoing serial publication already classified in W3.)
- Directories of congresses W 3.5
(Classify bibliographies of congress publications in ZW 3. Note that as of July 1, 1988, NLM no longer assigns W3.5 or ZW 3 to newly acquired publications.)
- Dissertations, by university W 4
(Classify reproductions by subject)
- American dissertations, by author W 4A
(Classify reproductions by subject; classify dissertations which qualify as Americana in WZ 270.)
- Collected works (General) W 5-6
- By several authors W 5
- Pamphlet volumes. Miscellaneous reprint volumes W 6
- By individual authors W 7
- Addresses. Essays. Lectures (General) W 9
(Classify works on specific topics by subject.)
- Travels (including expeditions and voyages) W 10
- [This number not used] W 11
(Use WZ if appropriate number is available. When there is no appropriate WZ number, the history of a topic is classed with current practice.)
- Dictionaries. Encyclopedias W 13
(Classify material on medical shorthand here if it is the primary subject of book.)
- Terminology W 15
(Works on classification of disease and on disease eponyms
See: WB 15.; )
- Tables. Statistics W 16
- Atlases. Pictorial works W 17
- Education W 18
(Classify here works about education.)
- Educational materials W 18.2
(Classify here educational materials, e.g., outlines, questions and answers, programmed instruction, catalogs, computer-assisted instruction, etc., regardless of format. Classify textbooks, regardless of format, by subject.)
- Schools and colleges W 19
- School catalogs, announcements, etc.) (Table G) W 19.5
(Classify here works of all schools including schools of dentisry and nursing.)
- Graduate and continuing medical education (including fellowships, internships, residencies, etc.) W 20
- Medical research (General) W 20.5
(Classify here material on the various aspects and accomplishments of medical research. Classify works on research limited to a particular subject with the subject.)
- Fraternities (Cutter from name of fraternity) W 20.9
- Medicine as a profession. Peer review W 21
(Classify here works about medical careers. Classify those about other specific careers with the specialty, e.g., those about nursing in WY 16. Classify works on the specialities in general in W 87.)
- Allied health personnel. Allied health professions W 21.5
(Classify here works about supply and distribution as well as those about careers. Classify works on specific personnel in more specific number when available, e.g., those on nurses aides in WY 193. Classify works on health manpower including physicians in W 76.)
- Directories (Table G) W 22
- General coverage (Not Table G) W 22.1
- Laboratories, institutes, etc. W 23-24
- Collective W 23
- Individual (Cutter from name of institution) W 24
- Equipment and supplies W 26
(Classify here medical and surgical supply and instrument catalogs as well as catalogs of special equipment, e.g., tables and chairs in doctors' waiting rooms. Include works on history of instruments in general.)
- Medical informatics. Health informatics W 26.5
(Classify works on use for special subjects by subject.)
- Museums, exhibits, etc. W 27-28
- Collective W 27
- Individual (Cutter from name of institution or exhibit) W 28