In bookkeeping, an account refers to assets, liabilities, income, expenses, and equity, as represented by individual ledger pages, to which changes in value are chronologically recorded with debit and credit entries. These entries, referred to as postings, become part of a book of final entry or ledger.

Examples of common financial accounts are sales, accounts receivable, mortgages, loans, PP&E, common stock, sales, services, wages and payroll.

Other types of accounts may cover emissions.

A chart of accounts provides a listing of all accounts used by particular business, organization, or government agency.

Source: Account (bookkeeping) (Wikipedia)