  The Gene Ontology (GO) project is the largest resource for cataloguing gene
function. The combination of solid conceptual underpinnings and a practical set
of features have made the GO a widely adopted resource in the research
community and an essential resource for data analysis. In this chapter, we
provide a concise primer for all users of the GO. We briefly introduce the
structure of the ontology and explain how to interpret annotations associated
with the GO.
