When it comes to types of bookkeeping systems, there are two main types, i.e., single-entry bookkeeping and double-entry bookkeeping systems. Single-entry bookkeeping systems require the recording of only one side of transactions. This method is often preferred by small businesses, sole proprietors and companies for minimal transaction activity. On the other hand, the double-entry bookkeeping system is a practice of recording both sides of a transaction in at least two accounts, such as a debit or credit account