Pi Theta Epsilon is the national occupational therapy honor society for students and alumni, with 56 chapters nationwide. The society contributes to the advancement of the profession through the recognition of superior scholarship among students enrolled in professional entry-level programs at accredited occupational therapy schools across the United States.

Pi  is the first letter of the Greek word for Advancement.
Theta is the first letter of the Greek word for Therapeutic.
Epsilon is the first letter of the Greek word for Occupation. Thus, Pi Theta Epsilon means Advancement in Occupational Therapy.