OSW may refer to:
*
Centre for Eastern Studies
The Centre for Eastern Studies (, OSW) is a Warsaw-based think tank that undertakes independent research on the political, economic and social situation in Central and Eastern Europe, Balkans, Caucasus and Central Asia.
The centre was founded i ...
, a Polish think tank
* FAL OSW, a
variant of the FN FAL folding-stock paratrooper rifle
*
Objective Sniper Weapon, the original name of the Barrett XM109
* Official Scrabble Words, a
Scrabble lexicon
* Open Spatial Workshop, a group of three Australian artists, winner of the 2005
Melbourne Prize for Urban Sculpture
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