Minor is the opposite of Major. Major is a type of Discipline. 
Laser can be used for Accuracy. Laser is related to Beam. Beam is a type of Side. Side is related to Square. 
Minor <--Antonym--> Major --IsA--> Discipline 
Accuracy <--UsedFor-- Laser <--RelatedTo--> Beam --IsA--> Side <--RelatedTo--> Square 