In 1988, Donald Norman appropriated the term affordances in the context of human–machine interaction to refer to just those action possibilities that are readily perceivable by an actor.
1988. aastal omistas Donald Norman termini "sobimus" tähenduse inimese-masina koostoime kontekstis sellistele tegevusvõimalustele, mis on kergesti tajutavad tegutseja poolt.