[Mears]

“VARIOUS freepers described the difference between Columbia University and Columbia College.”

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Columbia University INCLUDES Columbia College.

https://www.columbia.edu/content/academics/schools

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[Fred Nerks]

WIKI SAYS THEY ARE AFFILIATED

https://en.wikipedia.org/wiki/Columbia_College_(New_York)

An affiliate is an organization which is officially connected with another, larger organization or is a member of it.