Applied mathematics is the use of mathematical formulas and methods to solve real-world problems and develop innovations. It is used in many different industries, including computer science, biological science, engineering, aeronautics, and business. Applied mathematics internships are typically open to students majoring in or who have graduated with a degree in applied mathematics and plan to pursue a career utilizing their training. Research institutes often offer these internships, but you can also find them at companies that use significant amounts of math in their day-to-day activities. Your specific job duties vary, depending on the company and industry, but you are usually paired up with a professional in the field to learn more about how applied mathematics is utilized. Most of these internships occur over the summer, though some companies offer internships year-round.