Original: In the United States and Canada , a librarian might have a one or two-year ( more common ) master 's degree in library and information science , library science or information science ( called an MLS , MALIS , MSLS , MIS , MSIS , MS-LIS , MISt , MLIS , or MILS ) from an accredited university .
Simplified: To become a librarian in a university , a person needs to have a Masters degree in Library Science ( MLS ) or a Masters degree in Library and Information Science .