A point of sale (POS) is a place where a customer executes the payment for goods or services and where sales taxes may become payable. A POS transaction may occur in person or online, with receipts generated either in print or electronically. Cloud-based POS systems are becoming increasingly popular among merchants.
In a nutshell, a cash register is a machine that records sales transactions, gives change and holds money. A POS system is a computerized system that handles financial transactions, tracks inventory, and records many types of business data.
A “Database” POS has its own database in a closed and proprietary platform. Generally, these POS solutions work just fine until you start to scale your business and the complexities and risks of integration arise.