business logic
the part of the program that encodes the real-world business rules that determine how data can be created, stored, and changed
en-US/ˈbɪznɪs ˈlɑd͡ʒɪk/
en-GB/ˈbɪznəs ˈlɒd͡ʒɪk/
the part of the program that encodes the real-world business rules that determine how data can be created, stored, and changed