This reminds me of the WOM (write only memory, 1972). Computers as we know them today didn't exist back then. Back then we called them micro-controllers. Microsoft, Apple, Dell, none of those companies existed yet. If you needed to "analyze" something you had to build your own micro-controller. The WOM was supposed to be an inside joke at the company, but was accidentally published in the 1972 electronics catalog. It had a lot of engineers scratching their heads as exactly how to effectively apply a "write only memory" in a micro-controller. The company had so many calls from engineers they would re-publish the data sheet from time to time. I first saw in in 1978 in the LM catalog.
You can download the 1972 datasheet for the WOM here:
Dustin and Doris
2018 Crossroads, Sunset Trail 33CK,
38', 7600 lbs empty, 8300 lbs loaded.
2016 Tundra: 5.7L with towing package.