Janice , do you still remember how our filing system works ?   Yes , I have read the Filling Instruction carefully , since you showed me it last week .   Very good . What is the essence of filing , do you know ?   The essence of filing I remember is to bring together in a single folder or file all papers relating to a particular subject . And outgoing and incoming letters are kept in this file cabinet .   Yes , ' One customer--one file ' is essential . And remember to update them timely .   And each file should be named clearly , either in block capitals or in jet black typed capitals .   Correct .   A card index is very important in the filing system . It is a most helpful friend to a secretary , so it must be kept handy and up to date .   Yes , prompt and careful filing contributes greatly to the efficiency of our office . 