While it is most widely recognized as a product code in the adult entertainment industry—specifically part of the "S-One" (S1) studio library—it could also theoretically refer to a technical serial number or a part in a niche manufacturing catalog, though the former is much more common.
Why do studios use codes like SONE-190 instead of just titles? SONE-190
Understanding SONE-190: A Deep Dive into Digital Identifiers and Media Codes While it is most widely recognized as a