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Interpreting a Call
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First element: Indicates
the subject of the book (see schedule
for explanation). One, two, or three letters. Arrange alphabetically.
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| C | CT | D | DJ | DJK | DS |
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Second element: Indicates
the subject of the book (see schedule
for explanation). Whole numbers that might be followed by a decimal number.
Arrange numerically.
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DC |
DC 655 |
DC 655.5 |
DC 655.55 |
DC 655.7 |
DC 693 |
| Third element: Author and book numbers. Arrange alphabetically by letter and then numerically by decimal number. | |||||
| DC 655.5 .M3 |
DC 655.5 .S4 |
DC 655.5 .S47 |
DC 655.5 .S473 |
DC 655.5 .S53 |
DC 655.5 .T3 |
| Fourth element: Second author/book numbers. Arrange alphabetically by letter and then numerically by decimal number. Used only if first author/book numbers are identical. | |||||
| DC 655.5 .S4 A45 |
DC 655.5 .S4 C23 |
DC 655.5 .S4 C3 |
DC 655.5 .S4 R5 |
DC |
DC 655.5 .T8 A1 |
| Fifth element: Date. If everything else is identical for two call numbers, arrange them by date. Call numbers without dates come before call numbers with dates. | |||||
| DC 655.5 .S4 R5 |
DC 655.5 .S4 R5 1978 |
DC 655.5 .S4 R5 1986 |
DC 655.5 .T8 |
DC 655.5 .T8 1923 |
DC 655.5 .T8 A1 |
| Remember: Only the second element and the date are whole numbers. All others are decimal numbers (even when the decimal point is not shown). | |||||