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 cogitans'' Descartes' mental world **''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

* Reservoir railway station, Melbourne * Resistencia International Airport (IATA airport code: RES)

People

* Res (singer), American singer

Arts, entertainment, and media

Literature

* RES (magazine), ''RES'' (magazine), bimonthly

Music

Songs

* "R.E.S.", a song by Cardiacs from ''The Seaside (album), The Seaside'' * "The Res", a song by the American band Bright from Bright (American band Bright album), their self-titled album