The document discusses self-balancing ledgers, which are ledgers maintained separately for debtors, creditors, and general accounts. This allows for smooth record keeping and division of work in large businesses with many accounts. Specifically, it describes how a sales ledger tracks debtor accounts, a purchase ledger tracks creditor accounts, and a general ledger contains all other accounts. Adjustment accounts are used to balance each ledger and ensure the accuracy of postings between ledgers. Maintaining self-balancing ledgers provides advantages like easier error detection, verification of individual ledgers, and strengthening of internal controls.