"Dr." or "Dr." is a title for someone who has earned a doctorate (e.g., PhD). It is also used by medical practitioners in many regions of the world, regardless of whether they have a PhD degree. The title "Doctor" is often used as an informal way of saying that you are a qualified person. In order to be called "Dr.", one must have completed at least four years of graduate study in a recognized university or college. This could include any number of graduate programs including law school, nursing school, and even business schools that offer masters degrees. However, not all countries use this system. In some countries, it is enough to have a doctoral degree (PhD for scientists, DPhil for philosophers) in order to be called "Dr." Even so, most countries require an additional year of post-doctoral research before being allowed to use the title "Dr." Putting "Dr." in front of your name is a common practice among physicians. To become a physician, you must usually go through an extensive training program after graduating from college. The first two years will usually be spent in undergraduate studies preparing you for the rigors of medical school. After that, you will likely spend three more years in a hospital or medical facility under the close supervision of experienced doctors who will teach you the skills you need to become a physician.