I am a professional in my field. I work among other professionals. We have taken classes, studied, apprenticed, been licensed or certified by governing organizations and done other things to earn the title of Professional.
There are lots and lots of professionals on this site. My question is simple. What training, certification, classes, practicum, licensing, etc. do they have to have to claim and maintain the title "professional"? I'd like to hear from the mods, the pros, and enthusiasts on this. What have they/you done to earn this right and privilege?