Read the call number as follows when searching for the item on the shelf:
Z
The call number will always begin with 1-2 letters. Read them in alphabetical order:
A, B, BF...L, LA, LB, etc.
1003
The number following the letter(s) should be read as a whole number:
1, 2, 3, 45, 100, 1000, 2000, 2483, etc.
.P9
The next line will be a combination of a letter and numbers. Read the letter alphabetically. Read the number as a decimal:
.C65, .C67, .C783, .C8, .D238, .D45, etc.
2019
The last line is the year the book was published. Read in chronological order:
1997, 2001, 2014, 2020, etc.