Note: The data cover medical and nonmedical staff members who perform faculty duties such as instruction, research, and/or public service at 3,907 degree-granting institutions in the United States that are eligible to participate in the Title IV federal student-aid program, and who have neither tenured nor tenure-track status, or who work at colleges with no tenure system. Medical schools are counted in the data. Employees with multiyear contracts include those with continuing contracts or indefinite at-will employment agreements. Non-tenure-track faculty members include adjuncts.