The Fundamentals of Engineering (FE) Exam is required for certification as an Engineer in Training (EIT), which is the first step towards being certified as a Professional Engineer (PE). The Exam is administered by NCEES (National Council of Examiners for Engineering and Surveying), with certification through the State of Colorado Division of Professions and Occupations. (NOTE: Students who are moving to a different state can generally transfer their certification, by following instructions provide by their state's Division of Professions and Occupations.)
EIT and PE certification are required for careers in some fields, most frequently those involving human safety issues. The certification serves as a national standard indicating that a consistent level of proficiency in engineering fundamentals has been achieved.
You can find general information and details about the content of the FE Exam on the NCEES website.