Res or RES may refer to: Sciences Computing Russian and Eurasian Security Network Spanish Supercomputing Network (Red Española de Supercomputación) Energy RES - The School for Renewable Energy Science US Renewable Electricity Standard Renewable Energy Systems, a UK company Mathematics Residue (complex analysis) function Medicine Reticuloendothelial system, in anatomy Archaeology Répertoire d'Épigraphie Sémitique, a journal publishing Semitic language inscriptions Latin word meaning "thing" Entity (disambiguation) Object (philosophy) The first word of several Latin phrases: Res divina (service of the gods) Res extensa Descartes' physical world Res gestae (Things done) Res inter alios acta (A thing done between others) Res ipsa loquitur (The thing speaks for itself) Res judicata (A matter [already] judged) Res nullius (An unowned thing) Res publica (A public thing), the origin of the word republic Organizations Rail Express Systems Railway Enthusiasts Society, New Zealand Royal Economic Society, UK Royal Entomological Society Places Resistencia International Airport (IATA airport code: RES) People Res (singer), American singer Arts, entertainment, and media Literature RES (magazine), bimonthly Music Songs "R.E.S.", a song by Cardiacs from The Seaside "The Res", a song by the American band Bright from their self-titled album See also RE5 (disambiguation) Rez (disambiguation)