Imperian has hundreds of help files to help you learn more about the game and how to play.
2.14 Quitting from Imperian
Quitting from Imperian is accomplished simply by typing QUIT or QQ. When you quit, your character and equipment is saved. There is no need to save your character before you quit. When you type quit, there will be a delay of a few seconds. This is to prevent people from quitting as soon as they are attacked, for this is a very frowned-upon action. To prevent yourself from quitting during the delay, type STOP.