Call numbers can be found on the spine of a book, periodical or Audio-visual material.
Call numbers act as library items' addresses on the shelf. They are read left to right, volume by volume on each shelf, top to bottom on each section of shelving.
We use Library of Congress Classification, which consist of letters and numbers.
Library of Congress call numbers run progressively, in ascending alphabetical and numerical order.
The first line is read by letter, and then by number. The second line is read by letter and then decimal number, whether or not the decimal point is present. If the third line is a mix of letter and number, then read in the same way as the second line, which is by letter and by decimal number; if not, then read it as a date.
A book started with call number N72 can be found on the bookshelf in the row started with N1.
An L call number would be shelved to the left of an LA call number.
LB2328 would come before LB2329.
LB2328 C554 would come before LB2328 C63.
The first part of a call number indicates a particular subject area, such as N for fine arts, L for education. The second part is generally based on the author's name. The third part usually tells the year the item was published. The fourth part may describe varying things:
V: V means volume. If there are three books in a complete set, they share identical call number with different volume numbers (v.1, v.2 and v.3).
Date: If two books share identical call number except for date, it means these two books are different editions, or sequels under the same title.
C: C means copy. If two books share identical call number, only one of them with c.2 attached, then we know these two books are exactly the same.
Suppl: Suppl meas supplement. For example, if a books is published with an attachment such as a CD, DVD or booklet, the attachment shares identical call number with a Suppl. tailing to it.
The best way to find what's in the TNUA library is to search our online catalog.
Online catalog tells almost everything about an item:
Does the library owns it?
How many volumes in a set?
Who's the author / creator?
When was it published / released?
What's the call number / barcode number?
Is it available for borrowing?
"Request" and "Due date" appears means the item is checked out. "No. of requests" shows how many people are queuing for this item.
To access the checked out item, one may:
Click "Request" and log in to personal library account to place a hold on the item. An email message will be sent when the item is available.