Maybe so, but personally it seemed to be referred to as a "specification" or "spec" for a long time, and then suddenly around maybe 5 years ago I started to hear people use "PRD". I'm not sure what caused the change.
Seems commonly used in Big Tech - first time I heard it was in my current job. Now it's seared into my brain since it's used so much. Among many other acronyms which I won't bore you with.