Look up: OB Association

1. 
   OB Association
   (from the article `star cluster`) The chief distinguishing feature of the members of a stellar association is that the large majority of constituent stars have similar physical ... ...at the geometric centre of the cloud. Large cores (which probably contain subcondensations) up to a few light-years in size seem to give rise to ... St...
   Found on http://www.britannica.com/eb/a-z/o/2
   
   
2. 
   OB association
   15 × 15 arcminute field at the center of the Cygnus OB2 association. Image: Palomar Sky Survey A loose grouping of between about 10 and several hundred O stars and B stars, scattered across a region up to several hundred light-years across. The members of an OB association are all of rough...
   Found on http://www.daviddarling.info/encyclopedi
   
   
3. 
   Oberlin Student Cooperative Association
   `OSCA`, or the `Oberlin Student Cooperative Association`, is a 1.78 million dollar non-profit corporation that feeds 630 and houses 175 Oberlin College students. It is located in the town of Oberlin, Ohio, and is independent from but closely tied to Oberlin College. OSCA is the fourth-largest student cooperative in North America. It by far the biggest per-capita of any student coop, considering that Oberlin College has approximately 2700 students...
   Found on http://en.wikipedia.org/wiki/Oberlin_Stu
   
   
4. 
   Object association
   In the object-oriented programming paradigm, the word `association` means `union`. In object association, one object is formed from the union of two or more other objects. In object-oriented programming, there are two kinds of `object association`: aggregation and composition. Both intend to do the same thing, build `large` objects from `smaller` ones. They differ only conceptually, from an object system perspective.
   Found on http://en.wikipedia.org/wiki/Object_asso