What product data storage systems are used in grocery stores?

Question

Database

Good day, dear ones!
A worm has long settled in my head, interfering with a peaceful life. In order to calm and feed him, we need data from knowledgeable specialists in their field. The crux of the question is what software products are used to store product information (name, price, etc.) in grocery stores? I myself could find out directly in the networks, but somehow it turns out from the gate to turn all the time. For I am nobody and call me nobody. Knowing the software products, it would be possible to communicate with the developers on the topic of that same worm.
Thank you for possible answers or for sending in the right direction. Grateful for any help, including three letters :-)

Answer 1

1C

Answer 2

oracle + self-written software for sales at the checkout also 1c with ms sql
there is a lot of information about checkouts habrahabr.ru/company/crystal_service they can ask about data storage methods