What the Heck Is online pos system?

http://miloccru073.unblog.fr/2019/06/26/mobile-pos-system-10-things-i-wish-id-known-earlier/

An EPOS system consists of a tremendous quantity of your company data. It's difficult to obtain an EPOS system that meets with all your requirements in the very first place. Hence, you can think about an EPOS system