The system differentiates between a free master's degree and a master's degree in technology. The latter corresponds to the former "sivilingeniør" degree (not to be confused with a degree in civil engineering, which is but one of many degrees linked to the title "sivilingeniør", which is still in use for new graduates who can choose to also use the old title). All pre-2001 doctoral degree titles were replaced with the title "Philosophical Doctor degree", written "philosophiæ doctor" (instead of the traditional "doctor philosophiæ"). The title dr. philos. is a substantially higher degree than the PhD and is reserved for those who qualify for such a degree without participating in an organized doctoral degree program.