Tom Betsy Dr. Tom Betsy is a faculty member at Bergen College, where he teaches microbiology, anatomy, and physiology, among other courses, in their nursing school. Dr. Betsy is widely respected for his unique way of simplifying complex topics. Jim Keoghis a Columbia University faculty member, and author of 3 books in the Demystified series, including Data Structures, OOP, and Java Demystified. Read More Read Less