Sentence:  An examination of some forty catalogs of schools offering courses in interior design , for the most part schools accredited by membership in the <WSD>National</WSD> Association of Schools of Art , and a further `` on the spot '' inspection of a number of schools , show their courses adhere pretty closely to the recommendations . 
Meaning of the word marked with <WSD> tags:  any number of entities (members) considered as a unit