Tuesday, August 21, 2012

The Misreading of Call Numbers


Sorry for the not so appealing title for this post, but today while searching, I found my search on the shelf with some others where the cutter of the call number was read wrong.  The search had the call number PN1040 .A513 1997 and was shelved just after the PN1040 .A53 's.  It then clicked in my brain that a lot of patrons get confused on how to read the numbers of a call number.   Patrons’ confusion over reading call numbers is important because that is how we discover where they are miss-shelved.

Take for example the above call number, PN1040 .A513 1997 should be read where .A513 should be viewed as if you were reading a decimal.  In decimal reading, .513 is smaller than .53 and not larger.  Sometimes patrons don’t read it this way and see the .513 as 513 (five hundred thirteen), which is more than 53 (fifty-three) if you exclude the decimal point.  In addition, sometimes patrons think in the opposite direction when it comes to decimals as well where they stick a .513 before a .5.  Just because a decimal may have more numbers, does not mean it should go before a decimal with less numbers. 

Also sometimes, though rarer than the decimals, patrons read that PN1040 as being next to a PN104.  1040 is not one hundred forty, but one thousand forty as we would really read a 4 digit whole number this way without a decimal.  To continue on with numbers with decimals after the letters corresponding to the subject, 1040.56 is obviously more than 1040.5 (add a zero to the 5 and it becomes .50 which is less than .56 since zero is smaller than 6), but patrons also forget about that as well.

Therefore, we can use how patrons understand decimals and the other numbers in the LC call number system to our aid when searching for books by thinking the way they are misreading the numbers.

Hopefully in this explanation I have not confused you all and my attempt has not been in vain.

Happy Searching! J

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