Although not mandatory, manufacturers are strongly recommended to design products in accordance with the Power Control User Interface Standard — IEEE 1621 (formally known as Standard for User Interface Elements in Power Control of Electronic Devices Employed in Office/Consumer Environments).
I fabbricanti, pur non essendo obbligati, sono fortemente incoraggiati a progettare prodotti conformemente allo standard sul Power Control User Interface - IEEE 1621 (denominazione ufficiale: «Standard for User Interface Elements in Power Control of Electronic Devices Employed in Office/Consumer Environments»).