This section contains examples of call numbers. Please look carefully at these examples; some of them may require closer inspection than others.
The following example contains three call numbers that are are very similar except for one difference.
QC
981.8
.G56
G578
QC
981.8
.G56
G578
2002
QC
981.8
.G56
G578
2006
You’ll notice that the only difference in these call numbers is the date. Remember that “nothing comes before something.” That is why QC 981.8 .G56 G578 comes before QC 981.8 .G56 G578 2002, etc. It can be assumed in this case that the call number without a date is the first edition of the work and was likely published some time ago.
Is the next example in the correct order?
N
6537
.L522
H454
1988
N
6537
.L54
A2
2000
N
6537
.O39
M48
2001
N
6537
.O39
P48
1991
This example is in the correct order. If you thought that it might not be, chances are that is because of the Cutter numbers or the dates. Cutter numbers are often misread as whole numbers. It is also easy to get "tunnel vision" when reading call numbers by neglecting the alpha portion of the Cutter numbers, or by reading past the subject entirely. Here is the example again with the potentially confusing Cutter numbers in bold, red text.
N
6537
.L522
H454
1988
N
6537
.L54
A2
2000
N
6537
.O39
M48
2001
N
6537
.O39
P48
1991
Remember that Cutter numbers are always read as decimals. Which call number below is out of place?
M
1010
.M95
B6
1987
M
1010
.M95
B59
1987
M
1010
.M952
B595
1987
M
1010
.M98
B65
Did you find the book that is out of place? Look carefully at the bold, red Cutter numbers below.
M
1010
.M95
B6
1987
M
1010
.M95
B59
1987
M
1010
.M952
B595
1987
M
1010
.M98
B65
Because we read Cutter numbers as decimals, the first two books need to be switched (.59 is smaller than .60). This is the correct order:
M
1010
.M95
B59
1987
M
1010
.M95
B6
1987
M
1010
.M952
B595
1987
M
1010
.M98
B65
Cutter numbers can be tricky....