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iv If wrong letter is written and placed, it is very difficult to find.
v. It is difficult to decide in advance how much space will be required to keep the
files beginning with same letters.
vi. It is a time consuming method.

2. Numerical filing
Under this method, a serial
number is allotted to each
file and all the files are kept
in a shelf according to their
serial number. If a person has
more than one file, such files
are assigned with decimal
numbers like 15.1, 15.2, 15.3
and so on and such files are
also arranged along with
main file. This method is
specially used by libraries,
traffic police, insurance companies, etc. A separate index is prepared for the name of
the persons or firms for the quick location of required files and documents.

Advantages :

i. There is greater accuracy in filing.
ii. It is a flexible method since it has unlimited scope for expansion.
iii. Index can be used for other purpose for example, address list.

iv. This method maintains secrecy.
v. Easy referencing because the file number can be used as a reference.

Disadvantages :

i. It is a time consuming method of filing.
ii. A separate index is needed which increases the cost.
iii. A minor mistake in filing or index may cause a lot of inconvenience.

iv. Can't be used by other than qualified staff which is not suitable for small scale
organizations.

3. Geographical classification

Under this system, the files are classified on the basis of regions. Such classification
may be town-wise, district-wise, state-wise, country-wise or continent-wise. This

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