Something I’ve struggled with is finding language and concepts that feel right and fit our plural experience. Though our “diagnosis” (better stated as “professional validation”) doesn’t differentiate between OSDD and DID, I have always identified more with OSDD experience. OSDD is “otherwise specified dissociative disorder” and is often used to describe a form of plurality that is like “dissociative identity disorder” (DID), but doesn’t fully meet the criteria for amnesia and/or distinctness between parts (identities or alters). We identify with both these differences; we have more shared memory and less day-to-day amnesia, and often have less distinctness between parts.
Relatedly, “median” is a term defined by plural community that refers to experiences somewhere between “multiple” (a system of more than one identity/alter in a single body), and “singlet” (a single identity in a body). Median shares something with OSDD; it involves less distinctness between parts or more shared aspects. It is not the same as OSDD, though, as it is a community-defined term which may evolve differently from OSDD in the DSM, and may include experiences of being multiple (not median) when parts identify as separate people or identities, but share memory.