Good point - all those incandescent lamps must have put out huge amounts of heat. Similarly, the stereotypical giant plasma displays in old-school telco/ISP NO

Good point - all those incandescent lamps must have put out huge amounts of heat. Similarly, the stereotypical giant plasma displays in old-school telco/ISP NOCs made for a properly toasty environment. I know one ISP in the early 2000s who had to bring in a spare datacentre aircon unit to reinforce the puny office system which was completely unable to cope by itself.