In computing, an avatar is the graphical representation of the user or the user's alter ego or character. It may take either a three-dimensional form, as in games or virtual worlds, or a two-dimensional form as an icon in Internet forums and other online communities. Avatar images have also been referred to as "picons" (personal icons) in the past, though the usage of this term is uncommon now. It can also refer to a text construct found on early systems such as MUDs.