TK--The first letter or letters
represent the General Subject Area--in this case, 'TK' stands
for Electrical Engineering; Electronics; Nuclear Engineering
numbers in the second line of the call number represent a more
specific subject area--here, it stands for aspects of, or services
on the internet, browsers.
Author or title. For this book, it stands for Maze, Susan.
Year of publication.
book is Authoritative
Guide to Web Search Engines
by Susan Maze.
General Subject Area is United States History
more specific subject area represents biographies of Thomas Jefferson.
stands for the Author's last name, in this case Randall.
book is Thomas Jefferson: a life
by Willard Sterne Randall.
the first line in alphabetical order:
A, B, BF, C, D, ...L, LB, LC, M, ML ...
the second line as a whole number:
1, 2, 3, 45, 100, 1000, 2000, 2340 ...
third line is a combination of a letter and one or more numbers. Read
the letter alphabetically. Read the number(s) as a decimal.
.C65 = .65 .C724 = .724
.B before .C -or- .34 before .55 -or- .554
call numbers have more than one combination letter-number line.
RC 607 .A26 S56 1989
RC stands for internal medicine
stands for AIDS
S56 represents the author's last name--Silverstein
1989--the year of publication.
book is AIDS: deadly threat by Alvin Silverstein.
the date chronologically:
1776, 1848, 1929, 1964, 1998, 2003
Some call numbers don't have dates, especially if it represents the
first edition of a work or if it was published before 1982 (that's
when the Library of Congress began requiring that the date be added
to the last line of all call numbers).