What is a DTO and BO? What is the difference?

I know DTO is a data transfer object and a BO is a business object. But, what does it actually mean? When should I choose one over the other? From, what I understand DTO is just used to transfer data and doesn't have business logic. Does this mean that a DTO doesn't have any method only properties(getter and setter)? But, it still has properties of a BO. Can someone please explain? Thanks.