Happiness in Slavery is a song by an American band.
Feature Oriented Software Development -LRB- FOSD -RRB- is a general paradigm for program generation in software product lines , where a model of a product line is a tuple of 0-ary and 1-ary functions -LRB- program transformations -RRB- .. This page discusses a more abstract concept of models of product lines of product lines -LRB- PL ** 2 -RRB- called metamodels , and product lines of product lines of product lines called meta-metamodels -LRB- PL ** 3 -RRB- , and higher level concepts .