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IAD 301: Interior Architecture & Design Studio V

Reading Call Numbers

Here's a quick guide on how to read Library of Congress Call Numbers.


An image of a call number on a side of a book. An arrow points to the first line.

The first line is read in alphabetical order.

  • ex. This would be before the PQ's but after the PM's.


An image of a call number on a side of a book. An arrow points to the second line.

Read the second line in numerical order.

  • ex. This would be after PN 6746 and before PN 6747.1 or PN 6748.


An image of a call number on a side of a book. An arrow points to the third line.

The third line is tricky. Read the letter in alphabetical order then the number as a decimal.

  • ex. PN 6747 .S245 would come before PN 6747 .S5, because .5 in decimal is really .500!


An image of a call number on a side of a book. An arrow points to the fourth line.

Sometimes the fourth line will look like this and you read it exactly like the other line.

  • ex. PN 6747 .S245 P4713 would come before PN 6747 .S245 P8, because .8 in decimal is really .800!


An image of a call number on a side of a book. An arrow points to the fifth line.

When you see a line near the bottom that looks like a year, it is a year! This goes in numerical order.

  • ex. If there was a book just like this except the date was 2003, it would go before the 2007 edition.


You could think of a call number like a detailed address in reverse: planet, country, state, city, street, street number. Each line helps you narrow down the book's exact location!

Primo - Finding Books

Use the search box below to run a quick search for books, or use the advanced search page to limit your material type to books prior to searching. 

How to find print books we don't own

Browsing the Stacks for Relevant Books

Animated gif from Harry Potter and the Sorcer's Stone when Hermione throws a large book on a table in the library.
Chris Columbus, director, Harry Potter and the Sorcerer's Stone, 2001, Burbank: Warner Brothers Studio, animated gif,

Our library uses the Library of Congress Call Number Classification System to organize our books. If you know a little bit about what the call numbers stand for, you can browse the stacks more efficiently. 


Here are the main subclasses and a few sub-subclasses that might have relevant books for this class:


3rd Floor:

N - Visual arts

NA - Architecture

NA 1-60 - General

NA 100-130 - Architecture and the sate

NA 190-1555.5 – History

NA 1995 - Architecture as a profession

NA 2000-2320 - Study and teaching. Research

NA 2335-2360 - Competitions

NA 2400-2460 – Museums. Exhibitions

NA 2500-2599 - General works

NA 2599.5-2599.9 - Architectural criticism

NA 2695-2793 - Architectural drawing and design

NA 2835-4050 - Details and decoration

NA 4100-8480 - Special Classes of buildings

NA 4100-4145 - Classed by material

NA 4150-4160 - Classed by form

NA 4710-8480 - Classed by use

NA 4170-(7020) - Public buildings

NA 4590-5621 - Religious architecture

NA 7100-7884 - Domestic architecture. Houses. Dwellings

NA 7910-8125 - Clubhouses, guild houses, etc.

NA 8200-8260 - Farm architecture

NA 8300-8480 - Outbuildings, gates, fences, etc.

NA 9000-9428 - Aesthetics of cities. City planning and beautifying

NB – Sculpture

NC - Drawing, Design, Illustration

ND – Painting

NE - Print Media

NK - Decorative arts

NK 1-570 - General

NK 600-806 – History

NK 1135-1149.5 – Arts and crafts movement

NK 1160-1590 - Decoration and ornament. Design

NK 1160-1174 - General

NK 1175-(1498) - History

NK 1505-1535 - General works

NK 1548-1590 - Special subjects for design

NK 1648-1678 - Religious art

NK 1700-2195 - Interior decoration. House decoration

NK 1700-2138 - General. History, etc. Including special rooms

NK 2140-2180 - Decorative painting

NK 2190-2192 - Church decoration

NK 2200-2750 - Furniture

NK 2775-2898 - Rugs and carpets

NK 2975-3049 - Tapestries

NK 3175-3296.3 - Upholstery. Drapery

NK 3375-(9990) - Other arts and art industries

NK 3700-4695 - Ceramics

NK 4700-4890 - Costume

NK 5100-5440 - Glass

NK 5500-6060 - Glyptic arts

NK 6400-8459 - Metalwork

NK 8800-9505.5 - Textiles

NK 9600-9955 - Woodwork

NX - Arts in General

Click here for a more thorough explanation of the Visual Arts (N) call numbers.


5th floor:

HD - Industry. Land use. Labor

HD 7255-7256 - Vocational rehabilitation. Employment of people with disabilities

HV - Social pathology. Social and public welfare

HV 1551-3024 - People with disabilities. Including blind, deaf, people with physical and mental disabilities

Click here for a more thorough explanation of the Social Sciences (H) call numbers.


TD - Environmental technology. Sanitary engineering

TH - Building construction

TS - Manufactures

TX - Home economics

TX 901-946.5 - Hospitality industry. Hotels, clubs, restaurants, etc. Food service

TX 950-953 - Taverns, barrooms, saloons

TX 955-985 - Building operation and housekeeping

Click here for a more thorough explanation of the Technology (T) call numbers.