New Mexico Tech Library classifies materials using the Library of Congress system. The following is a brief outline of the Library of Congress Classification for selected subjects. For a more complete listing, ask a reference librarian.

 A     General works 

 B     Philosophy, Psychology, Religion 
	     B       Philosophy
	     BC      Logic
             BF      Psychology
	     BL-BX   Religion

 C-F   History 
	     CC      Archaelogy
	     CS      Genealogy
	     CT      Biography
             DA      Great Britain
             DC      France
	     DD      Germany
             DE      Classical Antiquity
             DK      Russia, Poland
             DL      Scandinavia
             DP      Spain, Portugal
             DS      Asia
             DT      Africa
             E       America (general) & United States (general)
	     F       United States (local), Canada, Latin America

 G-H     Social Sciences 
             G       Geography (general)
	     GN      Anthropology
	     GV      Physical Education, Recreation
             HA      Statistics
             HB-HJ   Economics & Business
	     HM-HX   Sociology

 J     Political Science 
             JC      Political Theory
	     JF-JQ   Costitutional History, Public Administration
	     JS      Local Government
             JX      International Law

 K     Law 
             K       Law (general)
             KF      Law of the United States

 L     Education 
             LA      History of Education
             LB      Theory of Practice
             LD-LG   Colleges & Universities

 M     Music 
             M       Scores
             ML      Literature
	     MT      Musical Instruction

 N     Fine Arts 
	     NA      Architecture
	     NB      Sculpture
	     NC      Drawing
             ND      Painting
             NE      Print Media
             NK      Decorative

 P     Language and Literature 
             P       Philosophy
             PA      Classical Language & Linguistics (general)
             PC      Romance Languages
             PE      English Language
             PF      German Language
             PG      Slavic Languages & Literature
             PJ      Oriental Languages & Literature
	     PL      Asian, African  Languages & Literature
	     PM      American Indian Languages
             PN      Literary History & Collections (general)
             PQ      Romance Literature
             PR      English Literature
             PS      American Literature
             PT      German Literature

 Q     Science 
             Q       Science
             QA      Mathematics
             QB      Astronomy
             QC      Physics
             QD      Chemistry
             QE      Geology
	     QH      Natural History
	     QK      Botany
             QL      Zoology
	     QM      Human Anatomy
             QP      Physiology
	     QR      Bacteriology

 R     Medicine (General) 
	     RA      Public Aspects Medicine
	     RC      Internal Medicine
             RM      Theraputics, Pharmacy
             RT      Nursing

 S     Agriculture 
             SB      Plant Culture
             SD      Forestry
             SF      Animal Culture
             SH      Fish Culture & Fisheries
             SK      Hunting, Wildlife Management

 T     Technology 
             TA      Engineering (general), Civil Engineering
	     TC      Hydraulic Engineering
	     TD      Environmental Engineering
             TE      Highway Engineering
             TH      Building Construction
             TJ      Mechanical Engineering
             TK      Electrical Engineering
             TL      Motor Vehicles, Aeronautics
	     TN      Mining, Metallurgy
             TP      Chemical Engineering
             TR      Photography
             TS      Manufactures
             TT      Handicrafts
             TX      Home Economics

 U     Military Science 

 V     Naval Science 

 Z     Bibliography and Library Science