Why are there different membership categories?

The College has seven different categories of membership; Register Professional Biologist (RPBio), Registered Biology Technician (RBTech), Applied Biology Technician (ABT), Biologists in Training, Trainee (RBTech), Trainee (ABT), and Student.  Students, Trainees, and Biologists in Training are categories that lead to becoming either an RPBio, RBTech, or ABT, and provide for membership in and support of the College while satisfying the academic and work requirements for membership as an RPBio, RBTech, or ABT.