Switched mains output for ATX

Current personal computers with an ATX motherboard are not provided with a switched mains output socket. It is therefore no longer possible to achieve automatic switching on or off of peripheral units with the computer on/off switch. This is not such a problem when switching on, because it is quickly seen when a peripheral unit is on or not. However, overlooking switching off at the end of the day or working session leads to needless energy consumption an possible shortening of life of the peripheral unit. It is, fortunately, simple to do something about this.