Thanks for that kar42. Credit noted in my copy of it. I worked in telecommunications and IT for 27 years and have friends still in that game. This cartoon applies to many, many place and installations. A project I did in 2002 for an oil trading company: They were very anxious about maintaining their online access through most of the installation process. So we identified the key components and found that the single device on which it all relied was supplied by a plug-top power supply. This little transformer was placed UNDER the raised floor in the equipment room so that no one knew where it was. It was not labelled. The DC power lead from it to the device was the usual thin cable and, where it entered into the device - it was not tied down. Thus any casual work taking place in the same cabinet could have accidentally ripped the little plug out of the back and they would have been stranded.