From the December 1982 issue of Creative Computing.
Kensington Microware was founded in November of 1981. The first product that they released was the System Saver in 1982. The System Saver was a combination of cooling fan and surge suppressor. There were also two outlets to plug in a monitor, and a printer. It clipped neatly to the side of the Apple II. The device sold for $89.95. I was unable to find a magazine review of the product. But I did find the following comment on the Vintage Computer Federation forum:
There is a Kensington Microware "System Saver" attached to its side. It simplifies power cables management, does line surge suppression, and adds a "quiet cooling fan" that's fortunately not that quiet. All this for the cost of extremely high power consumption?? There's a sticker with 115V 9A written on it.
As far as I can tell, the System Saver was the first cooling device for a personal computer.
Kensinton is still around today. They dropped the Microware part of the name and still sell computer peripherals.
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Neat! I’m pretty sure I owned a trackball mouse from Kensington back in the day.