Business transactions involve the exchange of value, such as goods or services for money, between two or more entities. There are two main types of transactions: cash transactions involving an exchange of cash, and credit transactions where payment is promised at a future date. Capital refers to the value invested in a business by its owner, while drawings refer to amounts withdrawn by the owner. Assets are items owned by a business that have value, and liabilities are amounts owed to outside parties. Revenue is the income generated from sales or services, while expenses are costs incurred to generate that revenue.