From Tom Worthington
Feedback talked about devices consuming power when supposedly turned off and suggested a requirement that “off really means off” (31 March). But this is already the case.
There are two international standard symbols for a power switch. The one for a true on/off switch has an unbroken circle with a vertical stroke within it. This is the IEC 5010 power on-off symbol. A device with a standby state has a broken circle, with the vertical stroke through the break – the IEC 5009 standby symbol.
Ironically, many power-saving initiatives incorrectly use the standby symbol as their logo.
Canberra, Australia
