Library of Congress call numbers are arranged alphabetically and numerically. Read a call number from left to right, top to bottom.
1
Read the first set of letters alphabetically.
D52
.K96
2008
DA389
.R23
2002
DB4
.M45
1999
PN5698
.B733
2007
2
Read the numbers following the first set of letters in numerical order.
M45
.J368
2001
M458
.G39
2007
M2641
.R77
1999
M4586
.C48
2006
3
Read the letters after the decimal point in the second line alphabetically.
HQ2268
.A25
1998
HQ2268
.B489
2006
HQ2268
.N24
2000
HQ2268
.S38
2007
4
Read the numbers following the decimal point in the second line in decimal order.
TA2
.G33
1985
TA2
.G34
2006
TA2
.G346
2000
TA2
.G35
2001
Hint: If it's hard to tell what the order should be, add zeros to the numbers until they all have the same number of digits. Then the order is easier see:
.340, .346, .350
5
The last line of the call number may be the year of publication
