For example, in computers, we often say "x86" to refer to 32-bit computers or software, even though technically 64-bit computers are also x86 - instead of saying x86_32 and x86_64, we say x86 and x64.
Likewise, we sometimes say "I'm connecting over Ethernet" to mean with an Ethernet cable, because many interfaces will say "Ethernet" for the wired connection and "Wireless" for the wireless, even though it would be clearer to say "wired Ethernet" and "wireless Ethernet".
For a more familiar example, you might ask someone "Milk or soy?" with the understanding that you're asking about cow milk vs. soy milk.
Question: Is there a name for this phenomenon, where you just say "[set A]" and expect people to understand that you specifically mean "items in set A but not in set B" even though B is a subset of A? It's somewhat related to contrastive focus reduplication in that it relies on shared understanding of the prototypical or iconic example of a category.