What are the types of transaction data in a retail store?

Some transactions include a sale, a return, a credit card approval, a credit card submission for payment, an inventory order or return to supplier, transfer of inventory between stores, time clock entry from employee, recording of a theft, sale of gift card, customer information initiation and update, shipping and receiving events, physical inventory and potential adjustments and lots more depending on specialty retail. E.g. background check for a gun seller.