What is mean by Office Account and Common Office Account being used at CBS Post Offices?

Office Account Basic (OAB)

1. These are simple internal accounts. These accounts help in managing the General Ledger
2. Accounts like Cash, Asset account , liability account , contingent accounts, interest , commission, exchange , discount and charges are opened under this scheme type 

Office Account will be SOLID+OfficeAccount ID

SOL ID - 8 digit i.e 57000100
Office Account ID - 4 digit i.e 0382 cheque clearance account

570001000382 will the cheque clearance account of Mysore HO

Cheque clearance account 0017 discontinued and the 0382 being used for cheque clearance of both account opening and subsequent deposit at CBS Post Offices