There was a subculture communicating on FIDOnet about collecting AOL installation media (3.5" disks) and reusing them. Somehow we ended up coining the term "bisk" to refer to AOL's given-away media, and much sadness was had when they moved to CDs.
So add one more to the list: a commercial disk reused for your custom .WAD files can be a bisk.
Looks a lot like The Last Gameboard[1], which almost worked well (but didn’t, at least for me). It had a mechanism for detecting and tracking pieces, and a module for FoundryVTT, but the tracking was too glitchy. And the hardware was too slow.
So add one more to the list: a commercial disk reused for your custom .WAD files can be a bisk.