Many people think that becoming a doctor is difficult. Others have some sense that becoming a physician takes many years and is expensive. Most people realize that being a physician is difficult yet rewarding. All these people are correct. Becoming a physician is a long, arduous, expensive process that can only be accomplished with great dedication.

The details of this process can be fascinating. For example, have you ever heard of the Scramble? How about the Match? Are you up on the AMCAS, AMCAS-E, or the NRMP? Can you tell me the difference between the SAT, MCAT, and the USMLE-1, USMLE-2, or USMLE-3? OK try this one - What's the difference between an M.D. and a D.O.? Strap yourself in because in this edition of How Stuff Works I will explain the process of becoming a doctor. You are about to take a ride through the unbelievable world of medicine, previously known but to a few!