A/C is a written abbreviation for account, used wherever space is tight on ledgers, bank forms, invoices and working papers. In bookkeeping it names a ledger account, as in "post to Rent a/c", meaning the Rent account in the general ledger; older handwritten ledgers and many British textbooks use it heavily, while US software shows the full account name instead. In banking it means a customer's deposit account, as in "credit a/c 12345678" or a cheque crossed "A/C payee only", which tells the paying bank to credit only the named payee's account. The plural is a/cs, and a/c no. means account number. Also see Chart of Accounts and Bank Account.