The term 'Calculus Prereq' refers to the prerequisite courses needed to take a calculus class. These prerequisites typically include Algebra (ALG) and Trigonometry (TRIG). Algebra is a branch of mathematics that uses symbols and equations to represent and solve problems, while Trigonometry is a branch of mathematics that studies the relationships between angles and sides of triangles. Together, these two courses provide the foundation for taking a calculus class.