Read call numbers line by line:
Read the first line in alphabetical order:
A, B, BF, C, D... L, LA, LB, LC, M, ML...
Read the second line as a whole number:
1, 2, 3, 45, 100, 101, 1000, 2000, 2430...
The third line is a combination of a letter and numbers. Read the letter alphabetically. Read the number as a decimal, eg:
.C65 = .65 .C724 = .724
Some call numbers have more than one combination letter-number line.
The last line is the year the book was published. Read in chronological order:
1985, 1991, 1992...
Sometimes a call number will contain a volume number, labeled v.1, v.2, etc. These are shelved in whole number numerical order within the set of books.
A call number will contain a copy number if there are multiple copies of the same book on the shelf, labeled c.1, c.2, etc. These are shelved in whole number order.
One thing to always keep in mind when shelving books and shelf-reading is that nothing comes before something.
If a book contains no volume number, that book comes before a book within a set that does contain a volume number. If a book contains no date in the call number, that book comes before the same book that does have a date in the call number.
Here is a shelf of books with the call number order explained: