- N - describes the subject area: read in alphabetical order
- 66 - describes the topic: read as a whole number
- B634- describes the author's last name: read in alphabetical order, then the number as a decimal
- 1999 - date of publication: read in chronological order
Example of call number order:
N66 .B634 1999
NA 9 .A34 2005
NA 20 .G4 2001
NA 100.G411.2001
NA 100 .G47 2008