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| HV 86 .A5 R38 |
HV 89 .D48 |
HV 89 .D48 1993 |
HV 98 .M287 |
HV 98 .M3 D5 1994 |
HV 98 .M3 Z9 |
HV 98 .M49 |
HV 99 .D598 |
At first you glance, you might think the books are out-of-order, until you take a closer look.
In the first line all the them start with HV - that's easy enough.
Rule: Read letter combinations first and place in alphabetic order.
The second line looks okay too, all being in numeric order - 86, 89, 98 and 99
Rule: Whole numbers in order from 1 to 9999.
For the third line, take a look at the fourth and fifth books - HV98 .M287 comes before HV98 .M3 because .287 is a smaller decimal number than .3
Rule: Line three contains decimals, so follow letters then decimal order.
With the fourth line, take a look at the fifth and sixth books - HV98 .M3 D5 1994 comes before HV98 .M3 Z9 because D (as in D5) precedes Z (as in Z9)
.Rule: Letters then numbers.
Finally, take a look at the second and third books - HV89 .D48 comes before HV89 .D48 1993 because the third book has a date in the call number.
Rule: Earliest date (or no date) comes first, if the rest of the call number is identical.
