PSD may refer to:
==Government and military== Payment Services Directive, EU regulation for payment services Pesticides Safety Directorate, UK Presidential Study Directive, a kind of national security directive from the Obama presidency Prevention of Significant Deterioration (PSD) permit, under the Clean Air Act (United States) Protective Services Detail, Personal Security Detachment, or Personal Security Detail; US military security details Armoured Division (Finland) ()
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).