Or theres the schools that only gives +'s out. Theres a lot of B+'s that could have been A-'s for me. That would be better for gpa of course. For this kind of stuff though(without the +/-), itd have made a huge difference for my gpa.
So instead you get your grade considered to be a 3.0 when it could have been a 4.0 if your school just used minuses.