UD or ud may refer to:
==Companies== UD Trucks, a Japanese truck manufacturer United Devices, a commercial distributed computing company United Distillers, a whiskey holding company Unterrified Democrat, an American newspaper Upper Deck, a manufacturer of collectibles and trading cards Hex'Air (IATA airline designator UD), a French regional airline
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).