I bet Harry Beck wouldn't have known what a user interface was, but that's really what he designed and he really took that challenge and broke it down to three principles that I think can be applied in nearly any design problem.
Segur que Beck no sabia què era una interfície d'usuari, però és el que va dissenyar. Va acceptar el repte i ho va dividir en tres principis bàsics que es poden aplicar a qualsevol problema de disseny.