ARCA or Arca may refer to:
== Companies == Arca (restaurant), a restaurant-bar in Tulum, Mexico Arca-Filmproduktion GmbH, the German film production company of Gero Wecker Arca Fondi SGR, Italian asset management company Arca Noae, developers of ArcaOS, an operating system based on OS/2 Arca South, an industrial estate in the Philippines ARCAspace, an aerospace company based in Las Cruces, New Mexico NYSE Arca, an online stock exchange previously known as Archipelago
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).