The single-entry and double-entry bookkeeping systems are the two methods commonly used. The single-entry method is similar to a checkbook; ... For example, if you write a check ...

“President Barack Obama is a masterly practitioner of the occult art of single-entry bookkeeping,” says Kevin Williamson. In concurrence, I would say only that while the art of “single-entry ...

That includes, for example, cash, inventory, accounts receivable, accounts payable, revenue and so on. If you use single-entry bookkeeping, you don't have an unadjusted trial balance.