Final answer:
The PSC, or Palmer School of Chiropractic, issued diplomas in chiropractic education in 1916 after a six-year course of study.
Step-by-step explanation:
In 1916, the Palmer School of Chiropractic (PSC) would have issued diplomas in chiropractic education. The Palmer School of Chiropractic, founded by D.D. Palmer, is known as the first chiropractic school in the world. A diploma from PSC would signify that a student has completed a course of study in chiropractic techniques, theories, and applications that typically lasted around six years during that era, as evidenced by Dr. Edward's notes referencing a six-year course and a year's research work associated with a scholarship.