I want to know about data link between ERP and POS systems. We have ERP and POS systems. Data Backup and data transfer software are used at POS system.
This is a vast subject and it's discussed for every application you use. My advice is to use Google Search and read about it on the websites listed as results. You will see that ERP and POS are usually discussed for a specific application. Every description or information will contain software suggestions where you can use data integration for ERP and POS.