HBS teaches most classes by discussing events in actual industries or businesses, based on case studies.
Whenever an alumnus or professor from HBS is mentioned in the case study, HBS is always referred to as a "Well-Known Eastern Business School" and never as Harvard Business School.
It becomes a joke and from time to time the Harvard Coop will sell t-shirts that read: A Well-Known Eastern Business School.
Stanford MBA students will recognize that bit of Harvard pomposity.
I still sortof like that Junior University in Palo Alto.