Microsoft Doors XP
El señor del link se tomó el trabajo de fotografiar y anotar cada picaporte que tocó en su día, a manera de experimento.
"Some doors close themselves after you let go of them (e.g., refrigerator doors). Many doors and drawers you need to close yourself (e.g., car doors)."
"It wasn't always clear to me what I should consider a "doorknob." For example, I did not photograph the elevator button at work. This is one of the things I had an ongoing internal debate about.[...]"
Ahá.
UPDATE: Más research en la onda Fluxus. Más recursos Fluxus.