Igloo . . I didn't even understand the post! . .Yes, I'm showing my ignorance here!. . But that's not an unkown experience for me - hah!
"Compatibility"
Capable of existing or performing in harmonious, agreeable, or congenial combination with another or others: compatible family relationships.
. . . but I guess it's more like:-
" A device, such as a computer or computer software, that can be integrated into or used with another device or system of its type."