Most of the confusion with Australian postgraduate programmes occurs with the research-based programmes, particularly scientific programmes. Research degrees generally require candidates to have a minimum of a second-class four-year honours undergraduate degree to be considered for admission to a Ph.D. programme (M.Phil. are an uncommon route). In science, a British first class honours (3 years) is not equivalent to an Australian first class honours (1 year research postgraduate programme that requires a completed undergraduate (pass) degree with a high grade-point average). In scientific research, it is commonly accepted that an Australian postgraduate honours is equivalent to a British master's degree (in research). There has been some debate over the acceptance of a three-year honours degree (as in the case of graduates from British universities) as the equivalent entry requirement to graduate research programmes (M.Phil., Ph.D.) in Australian universities. The letters of Honours programmes also added to the confusion. For example: B.Sc. (Hons) are the letters gained for postgraduate research honours at the University of Queensland. B.Sc. (Hons) does not indicate that this honours are postgraduate qualification. The difficulty also arises between different universities in Australia—some universities have followed the UK system.